Chemistry test 9

Which coefficients correctly balance the formula NH4NO2 ® N2 + H2O?

1,1,2

In the reaction represented by the equation N2 + 3H2 ® 2NH3, what is the mole ratio of nitrogen to ammonia?

1:2

The Haber process for producing ammonia commercially is represented by the equation N2(g) + 3H2(g) ® 2NH3(g). To completely convert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?

3.0 mol

What is the measured amount of a product obtained from a chemical reaction?

actual yield

To determine the limiting reactant in a chemical reaction, one must know the

available amount of each reactant.

A determination of the masses and number of moles of sulfur and oxygen in the compound sulfur dioxide would be studied in

composition stoichiometry.

The units of molar mass are

g/mol.

In most chemical reactions the amount of product obtained is

less than the theoretical yield.

Which reactant controls the amount of product formed in a chemical reaction?

limiting reactant

A balanced chemical equation allows one to determine the

mole ratio of any two substances in the reaction.

Each of the four types of reaction stoichiometry problems requires using a

mole ratio.

What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?

percentage yield

A chemist interested in the efficiency of a chemical reaction would calculate the

percentage yield.

A chemical reaction involving substances A and B stops when B is completely used. B is the

primary product.

When the limiting reactant in a chemical reaction is completely used, the

reaction stops.

A chemical equation is balanced when the

same number of each kind of atom appears in the reactants and in the products.

Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?

stoichiometry

If the percentage yield is equal to 100%, then

the actual yield is equal to the theoretical yield.

Which of the following would be investigated in reaction stoichiometry?

the mass of potassium required to produce a known mass of potassium chloride

What is the maximum possible amount of product obtained in a chemical reaction?

theoretical yield