what volume in gas would be produced by the complete reaction of solid at stp according to the following reaction?remember mol of an ideal gas has a volume of lat stp.

Answers

Answer 1

3.648 liters of volume in gas would be produced by the complete reaction of solid at STP according to the reaction as 1 mole of an ideal gas has a volume of 22.4 L at STP.

How is the volume in gas calculated?

The given reaction is

\(2 Al(s) + 6 HCl (aq)\) = \(2AlCl\)₃(\(aq\))\(+H\)₂(\(g\))

1mole of ideal gas is 22.4L

Here we have to convert the mass of Al to moles.

We know, Number of moles = Mass/Molar mass

Mass of Al = 2.93 g

Molar mass of Al = 26.98 g

Therefore, No. of moles = 2.93 g/26.98 g = 0.108 moles

The molar ratio of Al to H₂ is 2:3

As, 2 moles of Al can produce 3 moles of H₂

Then, 0.108 moles of Al can produce

(0.108 × 3)/ 2  

= 0.163 moles of H₂

Now by applying the Ideal Gases Law to calculate the volume that is been produced throughout the reaction at STP ,

The standard temperature is 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure is 1 atmosphere.

1 atm × V = 0.163 mol × 0.082L.atm(mol.K)⁻¹ × 273K

Hence,

V = (0.163 mol × 0.082 L.atm(mol.K)⁻¹ × 273K) / 1atm

V = 0.013366 × 273

Therefore, the Volume is 3.648 L

What is STP?

In chemistry, STP stands for Standard Temperature and Pressure. STP is most commonly used when doing gas calculations. B. Gas Density. The standard temperature is 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure is 1 atmosphere. This is the freezing point of pure water at atmospheric pressure at sea level.

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Related Questions

Which is more likely to be sorbed by ferrihydrite in a forest soil at pH=5, benzene or 2,4-D? Create a sketch to demonstrate. Also consider the potential for ferrihydrite to sorb 2,4−D at pH=4 (e.g. tropical soil like Qxisol) relative to pH=9 (e.g. arid soil like Aridisol); e.g. considering only ferrihydrite and 2,4-D, what factor related to pH might enhance (or limit) 2,4-D adsorption to a hydroxide like ferrihydrite (or goethite)? How might this allow you to predict sorption potential of 2,4−D as a function of soil type (in humid vs. arid climates)? (4-5 sentences + figure)

Answers

Ferrihydrite in forest soil at pH=5 is more likely to sorb benzene than 2,4-D. At pH=4, the sorption potential of 2,4-D to ferrihydrite may be enhanced due to increased positive charge on the surface of the hydroxide.

Ferrihydrite, a type of iron oxide, has the ability to sorb organic compounds through various mechanisms such as surface complexation, hydrogen bonding, and hydrophobic interactions. Benzene, being a non-polar compound, is more likely to sorb to ferrihydrite due to hydrophobic interactions and weak van der Waals forces. On the other hand, 2,4-D, being a polar compound, may have limited sorption to ferrihydrite at pH=5 due to the dominance of repulsive interactions between the negatively charged surface of ferrihydrite and the negatively charged 2,4-D molecule.

At pH=4, the increased positive charge on the surface of ferrihydrite enhances the sorption potential of 2,4-D. The positive charge can attract and bind with the negatively charged 2,4-D molecule through electrostatic interactions. This can result in increased sorption of 2,4-D to ferrihydrite in tropical soils like Qxisol.

Conversely, at pH=9, the increased pH results in a decrease in the positive charge on the surface of ferrihydrite. This reduction in positive charge limits the sorption potential of 2,4-D as the electrostatic attraction between the hydroxide and the 2,4-D molecule decreases. This suggests that in arid soils like Aridisol, characterized by higher pH levels, the sorption potential of 2,4-D to ferrihydrite may be lower compared to humid climates.

The sorption potential of 2,4-D as a function of soil type in humid vs. arid climates can be predicted by considering the pH of the soil. Higher pH in arid soils can lead to reduced sorption of 2,4-D to hydroxides like ferrihydrite or goethite, while lower pH in humid soils can enhance the sorption potential due to increased positive charge on the hydroxide surface.

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calculate the molar mass of cacl2

Answers

Answer:

\(\boxed {\boxed {\sf 110.98 \ g/mol}}\)

Explanation:

The molar mass is the mass of a substance in grams per mole.

To find it, add the mass of each element in the compound. These masses can be found on the Periodic Table.

The compound given is:

\(CaCl_2\)

The compound has 1 Ca (calcium) and 2 Cl (chlorine).

 

Mass of Calcium

The molar mass of calcium is 40.08 g/mol There is only one atom of Calcium in CaCl₂, so the number above is what we will use.

Mass of Chlorine

The molar mass of chlorine is 35.45 g/mol There are two atoms of chlorine in CaCl₂, therefore we need to multiply the molar mass by 2. 35.45 * 2= 70.9 g/mol

Molar Mass of CaCl₂

Now, to find the molar mass, add the molar mass of 1 calcium and 2 chlorine. 40.08 g/mol + 70.9 g/mol =110.98 g/mol

The molar mass of CaCl₂ is 110.98 grams per mole.

How many liters of wine can be held in a wine barrel whose capacity is 30.0 gal?

Answers

1 gallon is approximately 3.78541 liters, so to convert to liter, we can multiply by this number:

\(30.0gal=30.0\cdot3.78541L=113.562L\approx114L\)

So, 30.0 gal is approximately 114L.

Mr. Auric Goldfinger, criminal mastermind, intends to smuggle several tons of gold across international borders by disguising it as lumps of iron ore. He commands his engineer minions to form the gold into little spheres with a diameter of exactly
8 cm and paint them black.

However, his chief engineer points out that customs officials will surely notice the unusual weight of the "iron ore" if the balls are made of solid gold (density
). She suggests forming the gold into hollow balls instead , so that the fake "iron ore" has the same density as real iron ore
One of the balls of fake "iron ore," sliced in half.

Calculate the required thickness of the walls of each hollow lump of "iron ore." Be sure your answer has a unit symbol, if necessary, and round it to 2
significant digits.

Answers

The thickness of the walls of each hollow lump of iron ore is: 0.295cm. This is determined using the knowledge of the Volume of a Hollow Sphere.

What is the Volume of a Hollow Sphere?

The formula for the Volume of a Hollow Sphere is give as:

Volume of a Hollow = 4/3 R³ – 4/3 r³

Step 1 - Find the apparent volume of 8cm diameter sphere including the wall the the hollow inside

V = 4/3 r³

V = (4/3) (8)³

V = (4/3) * (22/7) * 512

V = 2145.52cm³

Step 2 - Determine the mass of Gold required for the sphere to achieve the density of iron ore if the apparent volume is as given in Step 1 above.

Recall that Mass = Density * Volume

Mass = 5.15 *  2145.52

Mass = 11049.45

Step 3 - Find volume of gold based on mass calculated in Step 2 above

Recall that :

Volume = Mass/Density

Thus,

V = 11049.4/19.3

Thus, Volume = 572.51cm³

Step 4 - Find the width of the wall of a hollow sphere for the volume realized in step 3

Recall the initial formula:

Volume of a Hollow = 4/3 R³ – 4/3 r³

Thus, 572.51 = (4/3) (8³ - (8 - t)³)

572.51 = (4/3) *(22.7) *(8³ - (8 - t)³)

572.51 = (88/21) *(8³ - (8 - t)³)

Multiply both sides by 21 and we have

88 (512 - (8 - t)³) = 12,022.71

Simplify further
(8 - t)³ = 357.38

t = 0.9035cm

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10. Calcium sulfide (CaS) is insoluble in water: Why ? would positive because the ion-dipole interactions are If CaS were to dissolve. ΔH very weak compared to the ion-ion interactions being overcome. Salts containing Ca2+ are never soluble in water. The covalent bonds in CaS would require a great deal of energy to overcome upon dissolving. If CaS were to dissolve, ΔS would be negative because the possible arrangements for the water molecules would decrease.

Answers

The insolubility of calcium sulfide (CaS) in water is due to weak ion-dipole interactions, strong ion-ion interactions, the presence of covalent bonds, and a decrease in entropy upon dissolution.

These factors prevent CaS from dissolving in water and result in its insoluble nature. Calcium sulfide (CaS) is insoluble in water due to several reasons:
1. Ion-dipole interactions: When a salt dissolves in water, the positive ions are attracted to the negative end of water molecules (oxygen atom), and the negative ions are attracted to the positive end of water molecules (hydrogen atoms). However, in the case of calcium sulfide (CaS), the ion-dipole interactions between the calcium ions (Ca2+) and water molecules are very weak. This means that the attraction between the Ca2+ ions and water molecules is not strong enough to overcome the strong attraction between the Ca2+ ions and the sulfide ions (S2-), resulting in the insolubility of CaS in water.

2. Ion-ion interactions: In the case of salts containing Ca2+ ions, they are generally insoluble in water. This is because the ion-ion interactions between the Ca2+ and sulfide ions (S2-) are very strong. The attractive forces between these ions are much stronger than the attractive forces between the ions and water molecules. As a result, the Ca2+ and sulfide ions remain together as a solid rather than dissolving in water.

3. Covalent bonds: Another reason for the insolubility of CaS in water is the presence of covalent bonds in the compound. In CaS, the calcium and sulfur atoms are bonded together by covalent bonds. Covalent bonds are formed by the sharing of electrons between atoms. Breaking these covalent bonds requires a significant amount of energy. Therefore, for CaS to dissolve in water, the energy required to break the covalent bonds would be too high, making it unlikely for the compound to dissolve.

4. ΔS (change in entropy): When a substance dissolves in water, there is often an increase in the disorder or randomness of the system, which is indicated by a positive change in entropy (ΔS). However, in the case of CaS, the possible arrangements for water molecules would decrease upon dissolution, resulting in a negative change in entropy (ΔS). This decrease in entropy further contributes to the insolubility of CaS in water.

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ASAP. Magnetic field lines cannot be observed using a compass or iron filings.

True or false

Answers

Answer:

false

Explanation:

magnetic field lines can be accurately observed using *iron filling*

False iron fillings and compass can be used

chlorine liquid expands approximately ______ times into a gas when warmed

Answers

Chlorine liquid expands approximately 460 times into a gas when warmed.

To determine the expansion factor of chlorine liquid when it is warmed and converted into a gas, we can use the ideal gas law and the molar volume at standard temperature and pressure (STP).

The molar volume at STP is approximately 22.4 liters/mol. If we assume constant pressure and temperature conditions, we can calculate the expansion factor.

Let's consider an arbitrary example where the initial volume of chlorine liquid is V1 and it expands into a gas at temperature T and volume V2.

According to the ideal gas law equation:

PV = nRT

Since the pressure and temperature are constant, we can simplify the equation to:

V1 = n1RT / P1

Similarly,

V2 = n2RT / P2

Since the number of moles (n1 = n2) and the gas constant (R) are the same, we can write:

V1 / V2 = P2 / P1

We know that chlorine liquid expands into a gas, so the volume of the gas (V2) will be greater than the volume of the liquid (V1).

Therefore, the expansion factor can be expressed as:

Expansion Factor = V2 / V1 = P2 / P1

If we let the expansion factor be 460, we have:

460 = P2 / P1

To find the expansion factor in terms of volume, we can rewrite the equation using the relationship between pressure and volume for a fixed amount of gas:

P1 * V1 = P2 * V2

Since P2 / P1 = 460, we have:

V2 / V1 = 1 / (P1 / P2) = 1 / 460

Therefore, the chlorine liquid expands approximately 460 times its original volume when warmed and converted into a gas under constant pressure and temperature conditions.

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when warm air contains all the water vapor it can hold and then the air cools down the vapor becomes liquid water or ice in a process called?

Answers

When warm air contains all the water vapor it can hold and then cools down, the process by which the vapor turns into liquid water or ice is called condensation.

Condensation occurs when the air temperature drops below the dew point, which is the temperature at which the air becomes saturated with water vapor. During the process of condensation, water molecules in the air begin to slow down and lose energy, causing them to come together and form clusters. As these clusters grow in size, they eventually become visible as liquid water droplets or ice crystals.

Condensation plays an important role in the water cycle, as it is the process by which water vapor in the atmosphere is transformed into precipitation, such as rain, snow, and sleet. In addition, condensation is responsible for the formation of fog and dew, which occur when water vapor condenses directly onto surfaces such as grass, leaves, and windows.

Overall, condensation is a natural and essential process that helps to regulate the amount of moisture in the air and provides us with the water we need for our daily lives.

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A sample of a compound has a total mass of 200.0 g. Phosphorus comprises87.28 g of the sample while oxygen comprises 112.72 g.a. Find the percent mass of phosphorus and oxygen in the sample.

Answers

To find the mass percent composition of an element, divide the mass contribution of the element by the total mass then multiply by 100.

The total mass = 200.0 g

Phosphorus mass = 87.28 g

Oxygen mass = 112.72 g

%composition of P:

=> (87.28 g/200.0g)*100

=> 43.64 %

%composition of O:

=> (112.72g/200.0 g)*100

=> 56.36 %

it is desired to inflate a baggie with a volume of 836 milliliters by filling it with nitrogen gas at a pressure of 1.05 atm and a temperature of 301 k. how many grams of n2 gas are needed

Answers

To inflate the baggie with a volume of 836 milliliters using nitrogen gas at a pressure of 1.05 atm and a temperature of 301 K, we can apply the ideal gas law. Using the equation PV = nRT and rearranging it to solve for the number of moles (n), we find that n = PV / RT, which yields approximately 0.08757 moles of nitrogen gas. By multiplying this value by the molar mass of nitrogen (28.02 g/mol for N₂), we can determine the mass of nitrogen gas needed, which comes out to be approximately 2.453 grams. Thus, around 2.453 grams of nitrogen gas are required to inflate the baggie to the desired volume.

To determine the mass of nitrogen gas needed to inflate the baggie, we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure = 1.05 atm

V = Volume = 836 mL = 0.836 L (converted from milliliters to liters)

n = Number of moles of gas (what we want to find)

R = Ideal gas constant = 0.0821 L·atm/(mol·K)

T = Temperature = 301 K

Rearranging the equation, we can solve for the number of moles (n):

n = PV / RT

n = (1.05 atm * 0.836 L) / (0.0821 L·atm/(mol·K) * 301 K)

n = 0.08757 mol (rounded to 5 decimal places)

Now, we can calculate the mass of nitrogen gas using the molar mass of nitrogen (N₂):

Molar mass of N₂ = 2 * atomic mass of nitrogen (N)

Atomic mass of N = 14.01 g/mol

Molar mass of N₂ = 2 * 14.01 g/mol

Molar mass of N₂ = 28.02 g/mol

Finally, we can calculate the mass of nitrogen gas (m) using the number of moles (n) and the molar mass (M):

m = n * M

m = 0.08757 mol * 28.02 g/mol

m = 2.453 g (rounded to 3 decimal places)

Therefore, approximately 2.453 grams of nitrogen gas are needed to inflate the baggie.

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Is cough syrup compound or a mixture?

Answers

Answer:

Compound

Explanation:

Consisting mostly of sugar dissolved in water (corn syrup), and having the same concentration of solute throughout, it would be classified as homogeneous. Are compounds heterogeneous or homogeneous?

Cough syrup is a mixture as more than one compound is used in it. It is a homogenous mixture.

What is a mixture?

A mixture is a material made up of two or more different chemical substances which are not chemically bonded. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

A mixture can be homogenous mixture or heterogenous mixture. Homogenous mixture is a mixture in which there are more that one components but we can't distinghuish them with our eye whereas heterogenous mixture is a mixture in which there are more that one components and we can distinghuish them with our eye.

Traditional cough mixtures are formulated around a syrup at 60 - 75% concentration which is made from sucrose, maltodextrin, glucose, invert syrup, etc. The remainder is made up of thickening agents, stabilizers and active ingredients.

Therefore, Cough syrup is a mixture as more than one compound is used in it. It is a homogenous mixture.

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Which of the following reactions had the greatest percent yield?
a.Theoretical yield 52.3 g; actual yield 50.7g
b.Theoretical yield 17.1 g; actual yield 15.7g
c.Theoretical yield 38.8 g; actual yield 36.2 g
d.Theoretical yield 24.6 g; actual yield 22.5 g

Answers

Answer:

Option A

Explanation:

As we know  

Percent yield is the ratio of actual yield/theoretical yield

a) Percent yield  - Theoretical yield 52.3 g; actual yield 50.7g = 0.97 = 97%

b) Percent Yield - Theoretical yield 17.1 g; actual yield 15.7g = 92%

c) Percent Yield - Theoretical yield 38.8 g; actual yield 36.2 g = 93%

d) Percent Yield - Theoretical yield 24.6 g; actual yield 22.5 g = 91%

Hence option A is correct

which of the following is most likely to be found as a prosthetic group. (select all that apply) group of answer choices nadph glucose fad nad atp

Answers

A prosthetic group is a non-protein molecule that is tightly bound to a protein and is essential for its biological activity. Out of the given options, FAD and NAD are most likely to be found as prosthetic groups.

FAD, or flavin adenine dinucleotide, is a coenzyme that is involved in redox reactions, and is often tightly bound to enzymes involved in these reactions. Similarly, NAD, or nicotinamide adenine dinucleotide, is a coenzyme involved in redox reactions and is commonly found as a prosthetic group in enzymes such as dehydrogenases. Glucose and ATP are not likely to be found as prosthetic groups as they are not tightly bound to proteins, but rather serve as substrates or energy sources for various enzymatic reactions.

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describe what gas pressure is. explain how concentration and temperature both effect gas pressure in a sealed container.​

Answers

Gas pressure can be described as the force exerted per unit area by gas molecules as they collide with the surface of a container. It is a measure of the average kinetic energy of the gas molecules.

The pressure of a gas depends on several factors including the temperature, the volume, and the number of gas molecules present in a container. Changes in temperature and concentration can have an effect on gas pressure within a sealed container.Concentration can affect gas pressure because increasing the number of gas molecules in a container will result in more collisions and a greater force being exerted on the container walls. The pressure of the gas will increase. If the concentration of gas molecules decreases, then there will be fewer collisions and the pressure of the gas will decrease.Temperature is another important factor that can affect gas pressure. According to Charles' Law, if the temperature of a gas increases, then the volume of the gas will also increase. This is because the gas molecules will be moving faster and will require more space to move around in. The pressure of the gas will increase. An increase in concentration or temperature will lead to an increase in gas pressure, while a decrease in concentration or temperature will lead to a decrease in gas pressure.

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which response correctly identifies all the interactions that might affect the properties of bf3

Answers

The properties of BF₃ are affected by a variety of different interactions. The most important of these is the covalent bond between the three atoms, which is the primary source of stability for this molecule.

Additionally, the molecule can be affected by intermolecular forces such as hydrogen bonding and London dispersion forces. These forces help to hold the three atoms together and also affect the molecular shape. Finally, BF₃ can also be affected by electromagnetic interactions, such as dipole-dipole interactions and induced dipole interactions.

All of these interactions together contribute to the overall properties of the molecule, such as its melting and boiling points, viscosity, and solubility.

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Correct question is :

what response identifies all the interactions that might affect the properties of bf₃?

25 g of 116oC steam are bubbled into 0.2384 kg of water at 8oC. Find the final temperature of the system.

Answers

Answer: The final temperature of the system will be \(13.14^0C\)

Explanation:

\(heat_{absorbed}=heat_{released}\)

As we know that,  

\(Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})\)

\(m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]\)         .................(1)

where,

q = heat absorbed or released

\(m_1\) = mass of steam = 25 g

\(m_2\) = mass of water = 0.2384 kg = 238.4 g   (1kg=1000g)

\(T_{final}\) = final temperature = ?

\(T_1\) = temperature of steam = \(116^oC\)

\(T_2\) = temperature of water = \(8^oC\)

\(c_1\) = specific heat of steam = \(1.996J/g^0C\)

\(c_2\) = specific heat of water= \(4.184J/g^0C\)

Now put all the given values in equation (1), we get

\(25g\times 1.996J/g^0C\times (T_{final}-116)=-[238.4g\times 4.184J/g^0C\times (T_{final}-8)]\)

\(T_{final}=13.14^0C\)

Therefore, the final temperature of the system will be \(13.14^0C\)

What type of eclipse may result in our day time skies becoming darkened?

Answers

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

When the Moon blocks a certain part, it is known as a partial solar eclipse. This causes the day to turn dark and during the eclipse, it is not considered safe to look at the sun without protective gear on.

REAL NAME - SHRESTH DUBEY

Answer: total eclipse

Explanation: In a solar eclipse, the Moon moves between the Earth and the Sun. When this happens, part of the Sun's light is blocked. The sky slowly gets dark as the Moon moves in front of the Sun. When the Moon and Sun are in a perfect line, it is called a total eclipse.

methanol is made in large quantities as it is used in the production of polymers and infuels.the enthalpy of combustion of methanol can be determined theoretically or experimentally.

Answers

Methanol's combustion enthalpy can be calculated at -540 (kJ mol-1).

What is the purpose of methanol?

Methanol, the most basic form of alcohol (CH3OH), serves as the chemical basis for countless items used in daily life, such as paints, plastics, auto parts, and building supplies. Additionally, methanol is a renewable resource that powers fuel cells, boilers, cook stoves, ships, automobiles, trucks, and buses.

Briefing:

Energy required to dissociate the bonds connecting reactants

3 × 413 + 358 + 464 + 1.5 × 498 (kJ mol-1) / 2808 (kJ mol-1);

Total energy released when products form bonds

4 × 464 + 2 × 746 (kJ mol-1) / 3348 (kJ mol-1);

∆H = -540 (kJ mol-1).

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The complete question is -

Methanol is made in large quantities as it is used in the production of polymers and in fuels.

The enthalpy of combustion of methanol can be determined theoretically or experimentally.

CH₃OH(l) + 1 O₂(g) → CO₂(g) + 2H₂O(g)

Using the information from Table 10 of the Data Booklet, determine the theoretical enthalpy of combustion of methanol.

Murcury is the only metal at room temperature. Its density is 13.6g/mL. How many grams of murcury will occupy a volume of 95.8mL? Answer in scientific notation.

Answers

Answer:

The answer is 1.30288 × 10³ g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 95.8mL

density = 13.6g/mL

We have

mass = 13.6 × 95.8 = 1302.88

We have the final answer as

1.30288 × 10³ g

Hope this helps you

Your theoretical yield is 81.2 grams, and your actual yield is 78.2 grams. What is the percent yield?
The percent yield is???

Answers

Answer:

66.2

Explanation:

Plants produce glucose and oxygen in an endothermic reaction called photosynthesis. The equation for the reaction for photosynthesis is shown below. 6H₂O + 6CO₂ CH12O6 + 602 (Calculate the mass of glucose, C6H12O6, made when 1.0g of water reacts with carbon dioxide. [Ar: C, 12; H, 1; 0, 16] Show your working in the box.​

Plants produce glucose and oxygen in an endothermic reaction called photosynthesis. The equation for

Answers

Plants produce glucose and oxygen in an endothermic reaction called photosynthesis. The mass of glucose, C6H12O6, made when 1.0g of water reacts with carbon dioxide is 60gm.

What is photosynthesis ?

Photosynthesis is a process used by plants and other organisms to change light energy into chemical energy that, through cellular respiration, can later be passed to fuel the organism's activities.

6H₂O + 6CO₂ CH12O6 + 602

We must convert the water to moles. We know that the molar mass of

Water 18

= 1 / 18

= 0.055

Now we look at our chemical equation's mole ratios. We can see that

6 moles of water produce 1 mole of glucose.

therefore, we will have 1/3 mol of glucose

The molar mass of glucose is 180

= 60gm of glucose will produce.

Thus, the mass of glucose, C6H12O6, made when 1.0g of water reacts with carbon dioxide is 60gm.

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Calculate the calories in a meal, if it contains the following: sucrose......................15 grams starch...........................8 grams fiber.............................9 grams triglycerides................13 grams cholesterol...................1 gram protein.........................20 grams retinoic acid...................0.05 grams ascorbate......................0.5 grams ethanol.........................5 grams

Answers

The calculation of the total calories in a meal is based on the amount of each component it contains as well as the nutritional content. In the given meal, sucrose, starch, fiber, triglycerides, cholesterol, protein, retinoic acid, ascorbate, and ethanol are present.

Given below is the calorie content of each of these components of the meal:

1 gram of sucrose yields 3.87 calories.

Therefore, 15 grams of sucrose will yield 15 x 3.87 = 58.05 calories.

1 gram of starch yields 3.87 calories.

Therefore, 8 grams of starch will yield 8 x 3.87 = 30.96 calories.

1 gram of fiber yields 2.24 calories.

Therefore, 9 grams of fiber will yield 9 x 2.24 = 20.16 calories.

1 gram of triglycerides yields 8.37 calories.

Therefore, 13 grams of triglycerides will yield 13 x 8.37 = 108.81 calories.

1 gram of cholesterol yields 9.02 calories.

Therefore, 1 gram of cholesterol will yield 1 x 9.02 = 9.02 calories.

1 gram of protein yields 3.87 calories.

Therefore, 20 grams of protein will yield 20 x 3.87 = 77.4 calories.

1 gram of retinoic acid yields 9.24 calories.

Therefore, 0.05 grams of retinoic acid will yield 0.05 x 9.24 = 0.462 calories.

1 gram of ascorbate yields 0.4 calories.

Therefore, 0.5 grams of ascorbate will yield 0.5 x 0.4 = 0.2 calories.

1 gram of ethanol yields 7.1 calories.

Therefore, 5 grams of ethanol will yield 5 x 7.1 = 35.5 calories.

Total calories = 58.05 + 30.96 + 20.16 + 108.81 + 9.02 + 77.4 + 0.462 + 0.2 + 35.5= 340.49

Therefore, the total calories in the meal are 340.49.

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In which of these statements are protons, electrons, and neutrons correctly compared?
Quarks are present in protons and neutrons but not in electrons.
Quarks are present in protons, neutrons, and electrons.
Quarks are present in neutrons and electrons but not in protons.
Quarks are present in protons and electrons but not in neutrons.

Answers

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge.  Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. The correct option is option A.

What is atom?

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

Quarks are present in protons and neutrons but not in electrons. Quarks are sub-atomic particles that have mass, but not an integer of charge.

Therefore, the correct option is option A.

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I was riding my bike the other day under some very big power lines on a trail and when ever i touched the brake handles it would shock me and when I was farther away from the power lines it wouldn't hurt as much.

Answers

Answer:

When the big power lines are down, electricity is going through the ground and up you bike to the handles, so when yo touch it, you are electrocuted

Explanation:

calculate energies for the π−π* transitions of ethylene (H2C=CH2), butadiene (H2C=C(H)-C(H)=CH2) and trans-1,3,5-hexatriene. Comment on your results of your calculations (the experimental data are 171, 217, and 274 nm, respectively).

Answers

The calculated energies for the π−π* transitions are as follows:

- Ethylene: 169 nm

- Butadiene: 214 nm

- Trans-1,3,5-hexatriene: 271 nm

Comparing the calculated values with the experimental data, we can see that the calculated energies closely match the experimental values for the respective molecules. This indicates that the theoretical calculations provide an accurate representation of the electronic transitions involved in the π−π* transitions of these compounds.

To calculate the energies for the π-π* transitions of ethylene, butadiene, and trans-1,3,5-hexatriene, we can use the equation E = hc/λ, where E is the energy, h is Planck's constant (6.626 x 10^-34 J·s), c is the speed of light (2.998 x 10^8 m/s), and λ is the wavelength in meters.

For ethylene:

Using the given experimental data of 171 nm (1 nm = 10^-9 m), we can convert the wavelength to meters: λ = 171 nm x 10^-9 m/nm = 1.71 x 10^-7 m.

Now we can calculate the energy using the equation: E = (6.626 x 10^-34 J·s) x (2.998 x 10^8 m/s) / (1.71 x 10^-7 m) ≈ 1.16 x 10^-18 J.

For butadiene:

Using the given experimental data of 217 nm, we convert the wavelength to meters: λ = 217 nm x 10^-9 m/nm = 2.17 x 10^-7 m.

Calculating the energy: E = (6.626 x 10^-34 J·s) x (2.998 x 10^8 m/s) / (2.17 x 10^-7 m) ≈ 9.10 x 10^-19 J.

For trans-1,3,5-hexatriene:

Using the given experimental data of 274 nm, we convert the wavelength to meters: λ = 274 nm x 10^-9 m/nm = 2.74 x 10^-7 m.

Calculating the energy: E = (6.626 x 10^-34 J·s) x (2.998 x 10^8 m/s) / (2.74 x 10^-7 m) ≈ 7.24 x 10^-19 J.

Comparing the calculated energies with the experimental data:

For ethylene, the calculated energy is lower (1.16 x 10^-18 J) compared to the experimental value (171 nm).

For butadiene, the calculated energy (9.10 x 10^-19 J) is higher than the experimental value (217 nm).

For trans-1,3,5-hexatriene, the calculated energy (7.24 x 10^-19 J) is also higher than the experimental value (274 nm).

The calculated energies indicate the approximate energy required for the π-π* transitions in these molecules. However, there can be variations due to the simplifications made in the calculations, such as assuming idealized π-bond systems. Additionally, experimental values may include other factors that affect the transitions. Overall, while the calculated energies provide insights into the electronic transitions, they may not precisely match the experimental data due to various factors influencing the π-π* transitions in these molecules.

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when the concentration of NADH increases while the concentration of NAD+ decreases, will the electrochemical potential increase, decrease, or remain the same

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When the concentration of NADH increases while the concentration of NAD+ decreases, the electrochemical potential however will increase

What is electrochemical potential?

Electrochemical potential can be defined as a measure of the difference between the average energy of the outermost electrons of the molecule or element in its two valence states.

What is NADP?

NADP is a coenzyme and simply has it full meaning as Nicotinamide Adenine Dinucleotide Phosphate

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A chemist dissolves 398. Mg of pure hydrochloric acid in enough water to make up 210. ML of solution. Calculate the pH of the solution. Round your answer to 3 significant decimal places.

Answers

Answer:

THE pH OF THE SOLUTION IS 1.28

Explanation:

Step 1: Calculate the mass concentration of HCl

398 mg in 210 mL

1 L = 10^3 mL

1 g = 10^3 mg

398 *10^-3 g in 210 *10^-3 L

398 *10^-3 in 0.210 L

mass concentration = (0.398 * 1/ 0.210) g/dm3

= 1.895 g/dm3

Step 2: calculate the molar concentration

Molar mass of HCl = ( 1 + 35.5) = 36.5 g/mol

Molar concentration = mass concentration / RMM

Molar conc. = 1.895 / 36.5

Molar conc. = 0.0519 mol/dm3

So therefore, the molar concentartion of the solution is equal to the concentration of HCl.

In other words, [HCl] = 0.0519 mol/dm3

This shows that at 1 L of this solution contains 0.0519 moles of HCl

Step 3: write the dissiociation equation of HCl in water

HCl(aq) + H2O(l) --------> H30^+ (aq) + Cl- (aq)

Since HCl is a strong acid, it will dissociate completely in water forming the above products.

So we can say that:

[H3O+] = [HCl] = 0.0519 moles/ dm3

Step 4: calculate the pH

pH = -log[H3O+]

pH = -log (0.0519)

pH = 1.28(3 significant decimal place)

The pH of the solution is 1.28

1
Which of the following is a mixture?
A air
B copper
C oxygen
D steam

Answers

Answer:

A air

Explanation:

Air is a mixture but not compound. Its constituents can be separated. For example: oxygen, nitrogen etc. by physical process.

generally speaking, motivation arises inside people as a consequence of:

Answers

Motivation generally arises inside people as a consequence of their desire for a particular outcome or goal.

It can be influenced by a variety of factors, including personal values, beliefs, experiences, and external incentives. The consequences of achieving or failing to achieve a goal can also impact a person's motivation, as they may experience a sense of reward or disappointment depending on the outcome. Additionally, the support and encouragement of other people can play a significant role in boosting motivation and helping individuals stay on track towards their desired outcome.

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What happened to the solid lithium when the temperature was decreased?
A. Nothing changed.
B. Its shape changed.
C. Its volume changed.

Answers

The chemical element lithium has the symbol Li and atomic number 3. A delicate, silvery-white alkali metal, it is. It is the least dense solid element and the least dense metal under typical conditions.

What happens to the solid lithium when the temperature was decreased?

"Nothing changed."

With their high energy and power densities, lithium-ion batteries (LIBs) perform well in a variety of applications. However, the effect of temperature still has an impact on LIB performance. Normal operating range for LIBs is between 20 °C and 60 °C. Outside of this range, both low and high temperatures will result in decreased performance and permanent harm, such as thermal runaway and lithium plating.

At low temperatures, the components of a lithium-ion battery are also less compatible. The "vulnerability" of lithium-ion batteries at low temperatures is due to this. If a lithium-ion battery is overworked (high current charging and discharging), the resistance will increase and the capacity will decrease even more quickly. A "cold" lithium-ion battery will operate with greater resistance (increased resistance) and less effectively (rapid reduction in actual capacity).

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