Hydrazine, ammonia, and hydrogen azide all contain only nitrogen and hydrogen. The mass of the hydrogen that combines with 1.00g of each compound is 1.4 x 10^-1g, 2.4x10^-1 g and 2.40x10^-2 respectively. Show how these data illustrate the law of multiple proportions.

Answers

Answer 1

Answer: The law of multiple proportions, states that when two elements combine to form more than one compound, the mass of one element, which combines with a fixed mass of the other element, will always be ratios of whole numbers. You divide each by the smallest, and you should get the right kind of ratio. We do as follows:

H in N2H4 = 1.4x10^-1
1.4x10^-1 / 2.4x10^-2 = 6

H in NH3 = 2.4x10^-1
2.4x10^-1 / 2.4x10^-2 = 10

H in HN3 = 2.4x10^-2
2.4x10^-2 / 2.4x10^-2 = 1

Answer 2

Answer: Hello there.
Hydrazine, ammonia, and hydrogen azide all contain only nitrogen and hydrogen. The mass of the hydrogen that combines with 1.00g of each compound is 1.4 x 10^-1g, 2.4x10^-1 g and 2.40x10^-2 respectively. Show how these data illustrate the law of multiple proportions.

H in HN3 = 2.4x10^-2
2.4x10^-2 / 2.4x10^-2 = 1

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Which of the following best describes what happens when molecular compounds melt? A.) Molecules separate into their component atoms. B.)Molecules move more slowly. C.) Molecules arranged in an irregular pattern change to a regular pattern. D.) Molecules arranged in a regular pattern change to an irregular patter.

Answers

I think the correct answer from the choices listed above is option D. When a molecular compound melts, they undergo the process of phase change from solid to liquid therefore molecules arranged in a regular pattern change to an irregular pattern. Hope this answers the question.

1. An unknown compound was found to have a percent composition of: 47.0%potassium, 14.5% carbon, and 38.5 % oxygen. What is its empirical formula? If
the true molar mass of the compound is 166.22 g/mol, what is its molecular
formula?

Answers

Answer:The empirical formula is KCO2

Explanation:

How many electrons in an atom could have these sets of quantum numbers? n=2?

Answers

A maximum of 8 electrons can share the quantum number n = 2.

Principal Quantum number has a symbol of "n". It tells you the energy level on which an electron resides. You need to determine exactly how many orbitals you have in this energy level before you can determine the number of electrons that can share the value of n.

The number of orbitals you get per energy level can be found using this formula:

no. of orbitals=n²

Each orbital can hold a maximum of two electrons, the formula would be:

no. of electrons=2n²

Using the given formulas:

no. of orbitals = n² = 2² = 4

no. of electrons =2 * 4 = 8

Explain why the changes shown are physical change

Answers

The changes shown are physicalchanges because when ice melts, it turns from solid to liquid.

What are physical changes?

Physical changes are when a substance changes in how it looks or acts without turning into something else. These changes can usually be undone, which means the substance can be brought back to how it was before.

When ice melts, it turns from solid to liquid. The tiny particles in the ice move around, but the stuff that makes up water stays the same. The process can go backwards, because the water that is a liquid can be turned back into ice.

When water gets really hot, it turns into gas called steam. The water molecules get enough energy to separate from each other and become vapor. Once again, the stuff that makes up water stays the same, and when steam cools down, it turns back into liquid water.

Learn more on physical changes on brainly.com/question/960225

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Answer:

Because physical change are reversible change. we can reverse into the orginal effect.

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Calculate the pH of 0.50M H2S

Answers

I got that pH=3.65 using the fact that Ka=[H⁺][A⁻]/[HA] at equilibrium. In the ice table, I stands for initial, C stands for change, and E stands for equilibrium.

I hope this helps. Let me know if anything is unclear.

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