which of the given aldohexoses is dextrorotatory? d-glucose d-galactose d-gulose d-mannose cannot predict

The rearrangement of the atoms is the reason why.

The synthetic materials form as a product due to chemical reactions with bonds breaking in the process; As the bonds break, the rearrange into these materials.

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Answer:

2000 mL

Explanation:

We have the following data:

Initial volume: V₁ = 1000 mL

Initial temperature: T₁ = -86°C + 273 = 187 K

Final temperature: T₂= 101°C + 273 = 374 K

According to Charles' law, as the temperature of a gas is increased at constant pressure, the volume is increased. That is expressed mathematically as:

V₁/T₁ = V₂/T₂

Thus, we calculate the final volume V₂ as follows:

V₂ = V₁/T₁ x T₂ = (1000 mL)/187 K x 374 K = 2000 mL

Therefore, the final volume is 2000 mL.

Answer:

5 moles of Sodium are required to produce 5 moles of Sodium Chloride.

Explanation:

I am assuming you were not given an equation and this is a synthesis reaction.

Let's begin by writing a balanced chemical equation for the synthesis of sodium chloride.

2Na⁺ + Cl₂⁻ -> 2NaCl

Since Cl₂ exists as a diatomic molecule, we must have 2 +1 charges from Na to balance out the 2 -1 charges of Cl₂ (-1 for each Cl atom). This will then form 2 moles of NaCl.

To produce 5 moles of sodium chloride, we can multiply the entire equation by 2.5. This will result in:

5Na⁺ + 2.5Cl₂⁻ -> 5NaCl

The stoichiometric ratios of this new equation is:

5 Na: 2.5 Cl₂: 5NaCl

5 moles of sodium (Na) are required to produce 5 moles of sodium chloride (NaCl).

Fructose does not undergo hydrolysis because it is a monosaccharide (option c).

Monosaccharides are the simplest form of carbohydrates, consisting of a single sugar unit. Fructose is a monosaccharide and is commonly known as a fruit sugar. It is a hexose (option b), meaning it has six carbon atoms.

Hydrolysis is a chemical reaction that involves breaking down a compound by adding water molecules. However, monosaccharides like fructose do not undergo hydrolysis because they cannot be further broken down into simpler sugars through the addition of water.

They are already in their simplest form and do not require hydrolysis for digestion or utilization in the body.

On the other hand, disaccharides (option d) and polysaccharides (option e) are more complex carbohydrates composed of multiple sugar units.

They can undergo hydrolysis, where the chemical bonds between the sugar units are broken by the addition of water, resulting in the formation of monosaccharides.

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Answer:

An outlier on a scatter plot represents something that doesn't fit.

The outlier on this scatter plot is D.(105, 320) might represent a newborn shark

Answer:

Bases and Acids are chemically opposite from each other,and there are multiple ways to distinguish how they react when dissolved in water.

Explanation:

The gauge pressure of the oxygen in the tank in atmospheres is 11.46 atm.

The gauge pressure is given as the pressure relative to the ambient atmospheric pressure. The gauge pressure can be calculated as:

Gauge pressure = System pressure - Atmospheric pressure

The system pressure of the 35-liter tank with 18.3 moles oxygen is given as:

Pressure = moles * Rydberg constant * Temperature / Volume

Pressure = 18.3 moles * 0.08 L.atm.mol⁻¹.K⁻¹ * 298 K / 35 L

Pressure = 12.46 atm

The standard pressure is given as 1 atm.

Thus, the gauge pressure of the oxygen in the tank can be:

Gauge pressure = System pressure - Atmospheric pressure

Gauge pressure = 12.46 atm - 1 atm

Gauge pressure = 11.46 atm

The gauge pressure of the oxygen in the tank in atmospheres is 11.46 atm.

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Answer:

The answer is 8.31 atm.

Explanation:

Ideal Gas Law = PV = nRT
(where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.)

First, convert the temperature from Celsius to Kelvin:

25°C + 273.15 = 298.15 K

Next, plug in the known values into the Ideal Gas Law equation:

P * 35.0 L = 18.3 moles * 8.31 J/mol*K * 298.15 K

Finally, solve for P:

P = (18.3 moles * 8.31 J/mol*K * 298.15 K) / 35.0 L

The pressure is in units of joules per liter. To convert it to atmospheres, divide by the atmospheric pressure in joules per liter:

1 atm = 101,325 Pa = 101,325 J/m^3 = 101.325 kPa

P (in atm) = (18.3 moles * 8.31 J/mol*K * 298.15 K) / (35.0 L * 101.325 kPa)

= 8.31 atm

The chemical equations given would be balanced below

The balanced equation of the various given chemical equations can be determined only when the number of atoms on the product part is the same with the number of atoms on the reactant side.

For 1.)

\(N_{2} + 3H_{2} ----- > 2NH_{3}\)

For 2.)

\(2KCl_{3} ----- > 2KCl + 3O_{2}\)

For 3.)

\(2NaCl + F_{2} ----- > 2NaF + Cl_{2}\)

For 4.)

\(2H_{2} + O_{2} ----- > 2H_{2} O\)

For 5.)

\(Pb(OH)_{2} + 2HCl ----- > 2H_{2} O +PbCl_{2}\)

For 6.)

\(2AlBr_{3} + 3K_{2}SO{4} ---- > 6KBr + Al_{2}(SO_{4})_{3}\)

For 7.)

\(CH_{4} + O_{2} ----- > CO_{2} + 2H_{2} O\)

For 8.)

\(C_{3} H_{8} + 3O_{2} ----- > 3CO_{2} + 4H_{2} O\)

For 9.)

\(C_{8} H_{18} + 8O_{2} ----- > 8CO_{2} + 9H_{2} O\)

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In any aqueous solution at 25°C, the ionic-product of water (Kw) is a constant value equal to 1.0 x 10⁻¹⁴ mol²/L².

Due to the auto-ionization or self-ionization of water, water molecules dissociate into hydronium ions (H₃O⁺) and hydroxide ions (OH⁻). At 25°C, the Kw is equal to 1.0 x 10⁻¹⁴ mol²/L².

This constant value of Kw plays a crucial role in understanding the acidity and basicity of aqueous solutions. It helps to establish the relationship between the concentrations of hydronium and hydroxide ions, as their product remains constant at a given temperature. The pH and pOH scales are derived from this relationship, providing a convenient method for measuring the acidity or basicity of a solution.

In summary, the ionic-product of water, Kw, remains constant at 1.0 x 10⁻¹⁴ mol²/L² for any aqueous solution at 25°C. This constant is a result of the auto-ionization of water and helps to understand the relationship between hydronium and hydroxide ions in the context of acidity and basicity.

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164 g of H₃PO₃ (phosphorus acid) would require 3 moles of H₂O for the reaction.

Given information,

Mass of H₃PO₃ = 164g

Moles of H₃PO₃ = 82 g/mol

The balanced chemical equation:

P₂O₃ + 3H₂O → 2H₃PO₃

For every 2 moles of H₃PO₃ produced, 3 moles of H₂O are required.

The number of moles of H₃PO₃:

Moles of H₃PO₃ = mass of H₃PO₃ / molar mass of H₃PO₃

Moles of H₃PO₃ = 164 g / 82 g/mol

Moles of H₃PO₃ = 2 mol

The number of moles of H₂O:

Moles of H₂O = (3/2) × moles of H₃PO₃

Moles of H₂O = (3/2) × 2 mol

Moles of H₂O = 3 mol

Therefore, 164 g of H₃PO₃ would require 3 moles of H₂O for the reaction.

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We need 3.50 g of ethylamine and 240.29 g of ethylammonium chloride to prepare 1.31 L of pH = 10.792 buffer with a total concentration of 2.34 M.

Ethylamine: 3.50 g Ethylammonium chloride: 240.29 g

To prepare 1.31 L of pH = 10.792 buffer with a total concentration of 2.34 M, we need to use the Henderson-Hasselbalch equation:

pH = pKa + log([base]/[acid])

First, we need to find the pKa of ethylamine using its Kb value:

pKa = -log(Ka)

= -log(Kw/Kb)

= -log(1.0 × 10⁻¹⁴/5.60 × 10⁻⁴)

= 9.208

Now we can plug in the values into the

Henderson-Hasselbalch equation:

10.792 = 9.208 + log([base]/[acid]) 1.584

= log([base]/[acid]) 10¹·⁵⁸⁴

= [base]/[acid] 38.75 = [base]/[acid]

Since the total concentration of the two components is 2.34 M, we can set up a system of equations:

[base] + [acid] = 2.34 [base]/[acid] = 38.75

Solving for [base] and [acid], we get:

[base] = 2.34/(38.75 + 1) = 0.0592 M [acid] = 2.34 - 0.0592 = 2.2808 M

Now we can find the masses of ethylamine and ethylammonium chloride needed:

Mass of ethylamine = (0.0592 M)(1.31 L)(45.08 g/mol) = 3.50 g

Mass of ethylammonium chloride = (2.2808 M)(1.31 L)(80.54 g/mol) = 240.29 g

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Answer:

Explanation:

Oppositely charged particles attract each other, while like particles repel one another. Electrons are kept in the orbit around the nucleus by the electromagnetic force, because the nucleus in the center of the atom is positively charged and attracts the negatively charged electrons.

The balanced equation of the reaction is:

To balance the chemical equation:

Mg + HNO₃ → Mg(NO₃)₂ + H₂

We need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is:

Mg + 2HNO₃ → Mg(NO₃)₂ + H₂

By adding a coefficient of 2 in front of HNO₃ and a coefficient of 2 in front of H₂, we balance the equation.

This ensures that there are two nitrogen atoms, six oxygen atoms, four hydrogen atoms, and one magnesium atom on both sides of the equation.

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Two substances, a and b were heated. Both substances change color. when cooled, both substances return to their original colors.

What is a physical change?

A physical alteration only affects the object's shape; the object's interior structure (its molecules) remain unaltered. It is possible to change the created element back into the original thing. A alteration that can be undone is reversible. The condition, shape, or size of an object can change due to a physical change.

Here, since after heating both the substances a and b change colour and again on cooling return back to their original form (previous colour), thus we can conclude that a physical change occurs in them on heating which reverts back on cooling, being a reversible process.

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The oxidation numbers of alkali metals are always positive because they have only one electron in their outermost shell. This means that they are highly reactive and readily lose this electron to form a positive ion.

The alkali metals include lithium, sodium, potassium, rubidium, cesium, and francium.

All of these elements have an oxidation number of +1 because they all have one valence electron that they are likely to lose in a chemical reaction. This is why the oxidation numbers of alkali metals are always positive.

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Answer:

distillation, collecting and cooling the steam

Explanation:

Answer:

B

Explanation:

sight, hearing, smell, taste and touch

Answer:

Most easiest answer..

There are 5 senses in human body.☺️

To determine the molar mass of an unknown acid, follow these steps:

1. Obtain the formula of the unknown acid.

2. Calculate the mass of a sample of the acid.

3. Determine the number of moles of the sample of the acid.

4. Determine the number of grams per mole of the acid.

The molar mass of the unknown acid can be calculated by dividing the mass of the sample of the acid by the number of moles of the sample of the acid. Molar mass is defined as the mass of one mole of a chemical substance. It is usually expressed in grams per mole. It is calculated by adding up the atomic weights of each of the atoms in the chemical formula of the substance. For instance, let's suppose you want to calculate the molar mass of an unknown acid, HA. The first step is to obtain the chemical formula of the acid, which is HA.

Then, using a balance, obtain the mass of a sample of the acid, for instance, 0.5 g. To determine the number of moles of the sample of the acid, you'll need to divide the mass of the sample by the molar mass of the acid.To determine the number of grams per mole of the acid, add up the atomic weights of each of the atoms in the chemical formula of the substance.

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The reactions are completed as folows;

2NaBr + Ca -----> CaBr2 + Na

2Mg + O2 ----> 2MgO

The electrochemical series has to do with the arrangement of atoms in order of reactivity. The metals that are up in the series are more reactive than the metals that are below.

In this case, the reactions are completed as folows;

2NaBr + Ca -----> CaBr2 + Na

2Mg + O2 ----> 2MgO

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Chemical change: A chemical reaction is the change of one chemical substance into another chemical substance. For instance: The rusting of iron, the curdling of milk, the digestion of food, breathing, etc.

What is a chemical reaction?

A chemical reaction is the change of one chemical substance into another chemical substance.

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Chemical  change is the change  chemical substance is transformed into another chemical substance.It is irreversible in  nature , for example Reaction of medicine in body , milk to curd etc.

1)Physical change temporary or reversible in nature but chemical change is irreversible in nature

2)In physical change there no new product is formed but in chemical change there formation of new product takes .

3) Physical change is change sin shape ,size or state for example freezing of water , melting of wax , and example of  Chemical change are Burning of  coal, digestion of food

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Answer:

- Anode: Co3+ | Co2+

- Cathode: Ni | Ni2+

Explanation:

The anode is where oxidation reaction occurs, and the cathode is where reduction reaction occurs.

From the table of reduction potencials, we find that:

- Co reaction:

- Ni reaction:

Now, to find out which one is the anode and which one is the cathode, it is necessary to compare the reduction potencials.

The reaction of Ni have negative potentials, so Ni will be the anode and Co will be the cathode.

When they talk about items found, they refer to molecules. According to Avogadro, one mole of any substance, regardless of its type, contains the same amount of molecules equal to 6.022x10^23.

Now they tell us about a molecule of silver and a mole of calcium. In one mole of calcium, there will be 6.023x10^23 molecules, which is different from one molecule of silver, so the answer will be false

Answer:

23

Explanation:

Answer:

The answer is functioning properly ok dude?

Explanation:

Answer: "The microscopic size of cells enable them to function properly.

Most organisms on Earth are multi-celled." is false

Explanation:

In unicellular organisms, cell division is the means of reproduction; in multicellular organisms, it is the means of tissue growth and maintenance. Survival of the eukaryotes depends upon interactions between many cell types, and it is essential that a balanced distribution of types be maintained. This is achieved by the highly regulated process of cell proliferation. The growth and division of different cell populations are regulated in different ways, but the basic mechanisms are similar throughout multicellular organisms.

Answer:

M = 0.0678 M

Explanation:

Hello there!

In this case, since the molarity of a solution is obtained by dividing the moles by the volume, it is firstly necessary to compute the moles of magnesium chloride in 0.968 g, via its molar mass, as shown below:

\(n=\frac{0.968g}{95.21g/mol}=0.0102mol\)

Next, since 150.0 mL in liters is 0.1500 L, according to the appropriate units, the resulting molarity is:

\(M=\frac{0.0102mol}{0.1500L}\\\\M=0.0678M\)

Best regards!

Glucose is a fundamental carbohydrate and a monosaccharide with the molecular formula C6H12O6. The types of atoms found in a glucose molecule include all of the following except nitrogen, so the correct answer is c. nitrogen.

Atoms are the smallest unit of an element that has the chemical characteristics of that element. The glucose molecule is made up of carbon, hydrogen, and oxygen atoms. It contains six carbon atoms, twelve hydrogen atoms, and six oxygen atoms. Glucose is a source of energy that is used by organisms. It's produced by photosynthesis in plants and is used as a source of energy in animal cells.Glucose is a monosaccharide, which means that it is a simple sugar. Other monosaccharides include fructose and galactose, which are isomers of glucose. It's a key component in many carbohydrate-containing foods such as bread, pasta, and potatoes. In the human body, glucose is used to provide energy to cells, and excess glucose is stored in the liver and muscles as glycogen. Glucose is also used as a sweetener in many foods and drinks.

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Answer:

Ions are atoms that have either gain or lose electrons from the neutral atom.

A loss of electrons results in a positive ion, called a cation, a gain of electron results in a negative ion called an anion.

Ionic compounds are formed by the combination of a cation and anion, or metal + nonmetal.

When naming ionic compounds, name the cation first, and the anion second, changing the ending to ide.

Explanation:

Hope it helped!

Answer:

• [ lost ] or [ gained ]

• [ cation ], [ anion ]

• [ metal ] + [ non-metal ]

• [ cation ] and the [ anion ] to [ compound with suffix "ide" or "ode" ]