What is the hydrogen ion and hydroxide ion concentration for a pH of 4.478? Is the solution acid or base?

The mole fraction and molality of alcohol, C₂H₅OH, in 85°proof vodka is 0.186 and 12.70 mol/kg respectively.

Data provided:

Molality = moles of solute/kilogram of solvent

Mole fraction = number of moles of solute/ total number of moles

Density = mass/volume

number of moles = mass/molar mass

molar mass alcohol, C₂H₅OH = 46 g/mol

molar mass of water = 18 g/mol

density of water = 1 g/mL

the density of alcohol = 0.79 g/mL

Calculating moles of solute

85° proof vodka = 1/2 * 85% v/v

85° proof vodka = 42.5 % alcohol

In 100 mL vodka:

Volume of alcohol = 42.5 mL

volume of water = 57.5 mL

mass of alcohol, C₂H₅OH = density * volume

mass of alcohol, C₂H₅OH = 0.79 * 42.5

mass of alcohol, C₂H₅OH = 33.575 g

moles of alcohol = 33.575 g / 46 g/mol

moles of alcohol = 0.730 moles

Calculating mole fraction

Total moles = 3.194 + 0.730

Total moles = 3.924 moles

Mole fraction of alcohol = 0.730/3.924

Mole fraction of alcohol = 0.186

Calculating the molality of alcohol

Therefore, the mole fraction and molality of alcohol, C₂H₅OH, in 85°proof vodka is 0.186 and 12.70 mol/kg respectively.

Read more about mole fraction here:

https://brainly.com/question/14783710
#SPJ1

The mass of glucose produced from 100.0 g H2O is 166.8 g C6H12O6.

Given:100.0 g CO2 reacts with 100.0 g H2O according to the equation below.

6CO2 + 6H2O → 6O2 + C6H12O6

How many grams of glucose, C6H12O6 form from the 100.0 g H2O

According to the reaction, 6 moles of water react with 6 moles of carbon dioxide to produce one mole of glucose and 6 moles of oxygen.

Balanced Chemical Equation:

6CO2 + 6H2O → 6O2 + C6H12O6

We have given the mass of H2O, so first, we will calculate the number of moles of H2O.

Number of moles of H2O:

Mass of H2O = 100.0 g

Molar mass of H2O = 18 g/mol

Number of moles of H2O = Mass/Molar mass

= 100.0 g/18 g/mol

= 5.56 moles

Now, we know that 6 moles of water react with 1 mole of glucose.

So, the number of moles of glucose produced:Number of moles of glucose:

6 moles H2O → 1 mole glucose5.56 moles H2O → (1/6) x 5.56 = 0.9267 moles glucose

Now we will calculate the mass of glucose from the number of moles of glucose.

Mass of glucose:Number of moles of glucose = 0.9267 moles

Molar mass of glucose = 180.2 g/mol (C6H12O6)

Mass of glucose = number of moles x Molar mass

= 0.9267 moles x 180.2 g/mol

= 166.8 g

Therefore, the mass of glucose produced from 100.0 g H2O is 166.8 g C6H12O6.

For such more questions on mass of glucose

https://brainly.com/question/29022388

#SPJ8

The mass (in grams) of chlorine gas is needed to react with 251 grams of iron is 479 grams. Option C.

To determine the mass of chlorine gas needed to react with 251 grams of iron, we need to use the stoichiometry of the balanced chemical equation:

2Fe + 3Cl2 → 2FeCl3

From the balanced equation, we can see that 2 moles of iron (Fe) react with 3 moles of chlorine gas (Cl2) to produce 2 moles of iron(III) chloride (FeCl3).

To calculate the mass of chlorine gas, we can follow these steps:

Step 1: Convert the given mass of iron (Fe) to moles.

Using the molar mass of iron (Fe), which is approximately 55.85 g/mol, we can calculate the number of moles of iron:

moles of Fe = mass of Fe / molar mass of Fe

moles of Fe = 251 g / 55.85 g/mol

moles of Fe ≈ 4.5 mol (rounded to one decimal place)

Step 2: Use the mole ratio from the balanced equation to find the moles of chlorine gas (Cl2) needed.

From the balanced equation, we know that 2 moles of Fe react with 3 moles of Cl2. Therefore, the moles of Cl2 can be calculated as:

moles of Cl2 = (moles of Fe / 2) * 3

moles of Cl2 = (4.5 mol / 2) * 3

moles of Cl2 ≈ 6.75 mol (rounded to two decimal places)

Step 3: Convert the moles of chlorine gas to grams.

Using the molar mass of chlorine gas (Cl2), which is approximately 70.90 g/mol, we can calculate the mass of chlorine gas:

mass of Cl2 = moles of Cl2 * molar mass of Cl2

mass of Cl2 = 6.75 mol * 70.90 g/mol

mass of Cl2 ≈ 479 grams (rounded to the nearest whole number) Option C is correct.

For more such question on mass. visit :

https://brainly.com/question/19385703

#SPJ8

The frequency (in hertz) of the x-ray having a wavelength of 4.73×10⁻¹⁴ hectometers is 6.34×10¹⁹ Hertz

Frequency is defined as the number of complete oscillations made in 1 second.

However, the frequency of a wave is related to wavelength according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

With the above formula, we can determine the frequency of the x-ray. Details below:

Velocity (v) = wavelength (λ) × frequency (f)

3×10⁸ = 4.73×10⁻¹² × frequency

Divide both sides by 4.73×10⁻¹²

Frequency = 3×10⁸ / 4.73×10⁻¹²

Frequency = 6.34×10¹⁹ Hertz

Thus, we can conclude, the frequency is 6.34×10¹⁹ Hertz

Learn more about frequency:

https://brainly.com/question/15326129

#SPJ1

Answer:

C.) It is the functional group that distinguishes one amino acid from another.

Explanation:

An R group is also known as a random group and is one of the key components of an amino acid. It contributes to their wide variety.

The role of an R group in an amino acid as It is the functional group that distinguishes one amino acid from another. Option C is correct.

The functional groups are the some groups of chemicals oh hydrogen and notrgen and oxygen or carbon combination like carboxylic acid they are combination of carbon and amines as they are amnio groups etc.

The R attached at the end represents the different functional gropus of amino acids in the chain of hydrocarbon compound or orgamic compounds as they are primay and secondry and tertiary amines.

Therefore, Option C is correct.The role of an R group in an amino acid as It is the functional group that distinguishes one amino acid from another.

Learn more about functional groups, here:

https://brainly.com/question/14618322

#SPJ2

Steel is produced from pig iron through a process known as steelmaking or iron and steel production.

The pig iron obtained from the blast furnace contains high amounts of carbon, impurities, and other elements. To convert pig iron into steel, the carbon content needs to be reduced to desired levels, and impurities must be removed.One common method of steelmaking is the basic oxygen process (BOP). In this process, pig iron is placed in a vessel called a converter, where oxygen is blown through the molten metal. The oxygen reacts with the carbon and impurities, causing them to oxidize and form gases that are released. Alloying elements and desired additives can be added at this stage to achieve specific steel properties. Another method is the electric arc furnace (EAF), where an electric arc is used to heat and melt the pig iron, allowing impurities to be oxidized and removed.The advantages of using steel are numerous. Steel is strong, durable, and versatile, making it suitable for a wide range of applications. It has high tensile strength, which means it can withstand heavy loads and pressures. Steel is also resistant to corrosion, making it ideal for construction, infrastructure, and transportation projects. It is a recyclable material, contributing to sustainability and reducing environmental impact. Additionally, steel can be fabricated into various shapes and sizes, allowing for customization and flexibility in design.References:

A. Ghosh and A. Chatterjee, Ironmaking and Steelmaking: Theory and Practice, PHI Learning, 2008.

R.H. Tupkary and V.R. Tupkary, An Introduction to Modern Iron Making, Khanna Publishers, 2010.

J.R. Davis, ed., ASM Specialty Handbook: Carbon and Alloy Steels, ASM International, 1995.

for such more questions on production

https://brainly.com/question/25597694

#SPJ8

0.0205 moles of water were lost if the amount of water lost was 0.369 grams. The given answer is in three significant figures with including zero before the decimal.

To find the number of moles of water lost, we need to know the molar mass of water (H2O).

Molar mass is the sum of the atomic masses of all the atoms present in a molecule.

Since the molecule of water contains two atoms of hydrogen and one atom of oxygen, the molar mass of water is given by the sum of the atomic masses of two hydrogen atoms and one oxygen atom, which is: 2(1.008 g/mol) + 1(15.999 g/mol) = 18.015 g/mol

Therefore, one mole of water has a mass of 18.015 g.

The number of moles of water lost can be calculated using the following formula: Number of moles = Mass of substance / Molar mass of substance

Substituting the given values, we get: Number of moles = 0.369 g / 18.015 g/mol = 0.0205 mol

Thus, 0.0205 moles of water were lost if the amount of water lost was 0.369 grams.

For more such questions on moles, click on:

https://brainly.com/question/29367909

#SPJ8

Answer:

Substance C

Explanation:

Substance C would be the answer because Substance C has a lower attraction level. Because of this, it takes more energy to take out of in order to become a liquid.

Answer:

H for the combustion reaction:

C6H12O6(s) + 6O2(g) => 6CO2(g) +6H2O(g)

The answer is -2.81 x 103kJ

Explanation:

The equation for the combustion of glucose is\(C_6H_1_2 O_6 + 6 O_2 ----- > 6 CO_2 + 6 H_2 O\)

The products formed in this reaction are Carbon dioxide and Water.

Combustion is a type of chemical reaction that takes place between substances that involves oxygen and produces heat and light in the form of a flame at which the rate of reactant combination is very high as the chemical reaction is in nature due to which more energy is released as a result of which the temperature of the reactant increases and accelerates the reaction even more.

It is a type of exothermic redox chemical reaction occur between a fuel that is a reductant and an oxidant.  Burning is an another word for combustion.

Examples of combustion include a burning matchstick – when the matchstick is struck against a matchbox, the friction heats the head of the matchbox to a temperature at which the chemical reacts and produces more heat, which then goes out into the air and gets burnt in the flame.

For above statement, The products formed in heat of combustion of glucose are Carbon dioxide and Water

Thus, the equation for the combustion of glucose is\(C_6H_1_2 O_6 + 6 O_2 ----- > 6 CO_2 + 6 H_2 O\)

The products formed in this reaction are Carbon dioxide and Water.

Learn more about Combustion, here:

https://brainly.com/question/15117038

#SPJ5

Answer:

Beryllium, because it is in period 2 and has four total electrons.

Explanation:

Answer:

Its carbon

Explanation:

The following are categorized into polar or nonpolar molecules:

a) Beryllium chloride (BeCl₂) is a nonpolar molecule. The Be-Cl bond is polar due to the electronegativity difference between beryllium and chlorine, but the molecule is linear with the two polar bonds pointing in opposite directions, resulting in a net dipole moment of zero.

b) Hydrogen sulphide (H₂S) is a polar molecule. The H-S bond is polar due to the electronegativity difference between hydrogen and sulfur, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

c) Sulphur trioxide (SO₃) is a nonpolar molecule. The S-O bonds are polar due to the electronegativity difference between sulfur and oxygen, but the molecule is trigonal planar with the three polar bonds pointing in different directions, resulting in a net dipole moment of zero.

d) Water (H₂O) is a polar molecule. The H-O bond is polar due to the electronegativity difference between hydrogen and oxygen, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

e) Trichloromethane (CHCl₃) is a polar molecule. The C-Cl bonds are polar due to the electronegativity difference between carbon and chlorine, and the molecule has a tetrahedral shape, resulting in a net dipole moment that is not zero.

Find out more on polar or nonpolar here: https://brainly.com/question/17118815

#SPJ1

INFORMATION:

We know that:

- in a sample of liquid argon the pressure is reduced from 10 atmospheres to 1 atmosphere at a constant temp of 100 K

And we must describe the changes argon will have

STEP BY STEP EXPLANATION:

To answer the question we can use the graph of the phase diagram to answer the question

The phase the diagram of the argon using that the normal boiling and freezing points of argon are 87.3 K and 84.0 K, respectively, the triple point is at 82.7K and 0.68 atmosphere would be

If we look for the point when the temperature is 100K and the pressure is 1 atm when can see that the state of argon would be gas. The change that the argon will have would be a change in its state from liquid to gas.

ANSWER:

The change that the argon will have would be a change in its state from liquid to gas. That means the argon vaporizes when the pressure is reduced from 10 atmospheres to 1 atmosphere at a constant temp of 100 K

8.Significant figures

(a) 8.9 x10^8 is correct

(b) 5.6x10^-8 is correct

(c) 0.00048 is correct

(d) 910 0000 is also correct.

The compound n - hexane as shown does not dissolve in water.

Due to a large difference in polarity between the two compounds, n-Hexane does not dissolve in water.

Water is a polar molecule, which means that one end of it (the hydrogen side) has a slight positive charge and the other end (the oxygen side) has a slight negative charge. The unequal distribution of electrons within the water molecule, which produces a dipole moment, is the cause of this polarity.

N-Hexane, on the other hand, is a nonpolar molecule. The electrons are uniformly distributed throughout the molecule, which is made up of carbon and hydrogen atoms bound together in a straight chain. N-Hexane lacks a substantial dipole moment as a result.

Learn more abaout hexane:https://brainly.com/question/30364285

#SPJ1

Based on the information provided, we have a reaction between hydrogen iodide (HI) gas and hydrogen gas (H₂) to form iodine gas (I₂). The equilibrium is represented by the equation:

2HI(g) = H₂(g) + I₂(g)

The concentration values given in the table correspond to the concentrations of H₂ and HI at different times.

a) From t=0 s to t=5 s: Without the specific graph mentioned in Figure 7.10, it is difficult to provide a precise explanation of the physical situation in the container during this time period. However, based on the equilibrium reaction given, we can make some general observations. At the start (t=0 s), the concentrations of H₂ and HI may be high. As time progresses, the reaction proceeds, and the concentrations of H₂ and HI may decrease while the concentration of I₂ increases. The specific behavior will depend on the rate of the forward and reverse reactions.

b) External factor altered at t=5 s: To bring about a change in the shape of the graph at t=5 s, some external factor must have been altered. The most likely factor is the total pressure within the container. Since the reaction involves gases, changes in pressure can affect the equilibrium position. However, according to the information given, a change in pressure will not affect equilibrium in this case since the number of moles of gas is the same on both sides of the equation. Therefore, if the shape of the graph changes at t=5 s, some other external factor, such as temperature or the addition of a catalyst, must have been altered.

c) Calculation of K at t=3 s: The equilibrium constant (K) can be calculated at any given time using the concentrations of the reactants and products. However, the concentrations of H₂ and HI at t=3 s are not provided in the information given. Without the necessary data, it is not possible to calculate K at t=3 s.

Lastly, the statement "1 dm³ COCI, decomposes" seems incomplete. If you provide additional information or clarify the question, I'll be happy to assist you further.

Answer: Insufficient amount of work provided.

Explanation:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

For more question on atom

https://brainly.com/question/26952570

#SPJ8

a) The strongest metal on the planet is tungsten.

When it comes to tensile strength, tungsten tops all other metals. One of the strongest metals known to man, tungsten has an ultimate strength of 1510 Megapascals.

In addition to having the greatest melting point of any unalloyed metal, tungsten boasts greater strength. Tungsten is frequently employed in electrical and military applications due to its strength.

Tin is a malleable, silvery-white metal that is highly flammable at ambient temperature.

Metal malleability is a complex subject. There is no objective test available to measure this feature, as we previously stated. We most frequently test it for hardness.

The most malleable and ductile metals are gold and silver. Pure gold and silver are too soft to be used to create items that will keep their shape.

Metals may be molded into different shapes, such as thin sheets or foils, without breaking or shattering because they are malleable. They are also ductile, making it simple to draw them into wires.

To learn more about metals from given link

https://brainly.com/question/4701542

#SPJ1

Answer:1.395x10^27 molecules of O2

Explanation:

2Fe + 3/2O2 —> Fe2O3

for every 2 atoms of Fe, 1.5 molecules of O2 —> 1.395x10^27

The mass of NaCl in 44mL of a 1.6M solution is 4.1grams.

The mass of NaCl can be calculated by using the following formula;

Molarity = no. of moles ÷ volume

Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

no of moles = 1.6M × 0.044L = 0.07moles

The mass of the sodium chloride solution can be calculated by multiplying the molar mass of the salt by the number of moles present in the solution.

The molar mass of NaCl solution can be calculated as follows;

M.M = 23g/mol + 35.5g/mol = 58.5g/mol

mass of NaCl = 58.5 × 0.07 = 4.1grams.

Therefore, 4.1grams is the mass of NaCl solution.

Learn more about molarity at: https://brainly.com/question/12127540

#SPJ1

Answer:

Heres the answer.

Explanation:

When you stir a spoonful of sugar into a glass of water, you are forming a solution. This type of liquid solution is composed of a solid solute, which is the sugar, and a liquid solvent, which is the water. As the sugar molecules spread evenly throughout the water, the sugar dissolves.

The following is involved in bonding between atoms is electron

There are four type of chemical bonds essential for life to exist and it is ionic bond, covalent bond, hydrogen bond, and Vander wall interaction and all of these are different kind of bond to play various role in biochemical interaction and the electron on the outermost energy level of the atom are called valence electron and the valence electron are involved in bonding one atom yo another

Know more about atom

https://brainly.com/question/18086077

#SPJ9

Answer:

Jaheem has a goal running a total of 125 miles this month. Each day that he ran, he ran 7 miles. Which expression could Jaheem use to determine how many miles he has left to run after running for d days?

x a.

125 – 7d

x b.

7d + 125

x c. fraction numerator 125 over denominator 7 d end fraction

x d.

7dExplanation:Jaheem has a goal running a total of 125 miles this month. Each day that he ran, he ran 7 miles. Which expression could Jaheem use to determine how many miles he has left to run after running for d days?

x a.

125 – 7d

x b.

7d + 125

x c. fraction numerator 125 over denominator 7 d end fraction

x d.

7d

Answer:

2 g/mL

Explanation:

The following data were obtained from the question:

Mass (m) = 5 g

Volume (V) = 2.5 mL

Density (D) =.?

Density is simply defined as the mass of substance per unit volume of the substance. Mathematically, it is expressed as:

Density (D) = mass (m) /volume (V)

D = m/V

With the above formula, we can obtain the density of the ball as follow:

Mass (m) = 5 g

Volume (V) = 2.5 mL

Density (D) =.?

D = m/V

D = 5/2.5

D = 2 g/mL

Therefore, the density of the ball is 2 g/mL.

The balanced equation for the reaction of acetylene (C₂H₂) and oxygen (O₂) is; 2 C₂H₂(g) + 5 O₂(g) → 4 CO₂(g) + 2 H₂O(g) + heat

The coefficients in the balanced equation represent the stoichiometric ratio of the reactants and products in the chemical reaction. In this case, 2 molecules of acetylene (C₂H₂) react with 5 molecules of oxygen (O₂) to produce 4 molecules of carbon dioxide (CO₂) and 2 molecules of water (H₂O), along with the release of heat.

The balanced equation shows that the number of atoms of each element is the same on both the sides of the equation, in accordance with the law of conservation of mass.

To know more about acetylene here

https://brainly.com/question/20529866

#SPJ1

The equilibrium expression for the reaction; C(s) + O₂(g) ------->CO₂(g) is [CO2]/[C] [O2] option C.

The equilibrium expression shows how much of the reactants are converted into products. If the equilibrium constant is large and positive, most of the reactants have been converted into products.

Thus, the equilibrium expression for the reaction; C(s) + O₂(g) ------->CO₂(g) is [CO2]/[C] [O2] option C.

Learn more about equilibrium constant:https://brainly.com/question/10038290

#SPJ1

Answer:I'm going to give some fictitious values just so that we can get some perspective on the matter.

Let's say that the surface temperature of our sun is 10, the surface temp of the bigger star- the red giant formed from leaving the main sequence, has a temp of 0.2. of that- 2.

We can also say that the radius of our sun is 10, and the radius of the red giant is 1000. (100 times more)

Using the equation:

L

=

σ

A

T

4

σ

= The Stefan-Boltzmann constant =

5.67

×

10

−

8

But we can ignore the constant, as we are only interested in a ratio of these values.

L

S

u

n

=

4

π

(

10

)

2

×

10

4

=

1.26

×

10

7

L

S

t

a

r

=

4

π

(

1000

)

2

×

2

4

≈

2.01

×

10

8

2.01

×

10

8

1.26

×

10

8

≈

16

So the newly formed, red giant star is almost 16 times more luminous than the sun. This is owing to the increased surface area of the star due to the massively increased radius.

A small sidenote:

There is an equation that might be useful for comparing the radii, temperature and luminosity of main sequence stars. As red giants are not on the main sequence it could not be used here, but if you stumble across a question where they ask you to find the radius, luminosity or temperature given the other two, you can relate it to the sun's characteristics:

r

s

t

a

r

r

s

u

n

=

√

L

s

t

a

r

L

s

u

n

×

(

T

s

u

n

T

s

t

a

r

)

2

(I know, it's not a beauty to look at- but it works)

Where

X

s

u

n

is the radius, temperature, and luminosity of the sun. These are not often given in numerical values, but this equation serves well when asked to find e.g the radius of a star, in solar radii given that a star is twice as luminous and has 5 times the temperature of that of the sun.

Hence:

T

s

t

a

r

=

5

T

s

u

n

L

s

t

a

r

=

2

L

s

u

n

r

s

t

a

r

r

s

u

n

=

√

2

L

s

u

n

L

s

u

n

×

(

T

s

u

n

5

T

s

u

n

)

2

(cancel the common terms)

r

s

t

a

r

r

s

u

n

=

√

2

×

(

1

5

)

2

r

s

t

a

r

≈

0.057

r

s

u

n

(divide both sides by 0.0057)

17.5

r

s

t

a

r

≈

r

s

u

n

So the star's radius is almost 17.5 times that of the sun.

Hopefully, you find this info useful!

Explanation:

Answer:

Weight

Explanation:

WHen talking about weight you’re referring to the force exerted to lift if, but when you’re talking about mass it’s just how much it weighs but not how much it takes to lift it.

The molecules that are considered organic molecules from the following are \(C6H12O6\), CH4 and NaCl.

A) \(C6H12O6\) - This is an organic molecule. Organic molecules are molecules that contain carbon and hydrogen atoms, and this molecule contains both.

D) CH4 - This is also an organic molecule. It contains carbon and hydrogen atoms.

E) NaCl - This is not an organic molecule. It does not contain any carbon or hydrogen atoms.

An organic molecule is a molecule that contains carbon atoms. Carbon atoms can form strong bonds with other elements, allowing organic molecules to form a wide variety of complex structures. Carbon is the element that makes organic molecules unique, as it forms strong bonds with other elements and can form long chains of atoms. Organic molecules are the basis of all life on Earth, and are found in all living organisms.

To learn more about organic molecules click here https://brainly.com/question/28843074

#SPJ4