Stoichiometry review

Front

What is stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

Front

What is the mole ratio in the reaction N2 + 3H2 → 2NH3?

Back

The mole ratio is 1:3:2 for N2:H2:NH3.

Front

How do you calculate percent yield?

Back

Percent yield = (Actual yield / Theoretical yield) x 100%.

Front

What is the theoretical yield?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, calculated based on stoichiometric ratios.

Front

What is the actual yield?

Back

The actual yield is the amount of product that is actually obtained from a chemical reaction.

Front

Define limiting reactant.

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product formed.

Front

In the reaction P4 + 3O2 → P4O6, which reactant is limiting if 12 moles of P4 react with 15 moles of O2?

Back

O2 is the limiting reactant.

Front

What is the significance of a balanced chemical equation?

Back

A balanced chemical equation ensures that the number of atoms for each element is conserved, reflecting the law of conservation of mass.

Front

How do you determine the number of moles from grams?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of NH3?

Back

The molar mass of NH3 (ammonia) is approximately 17.03 g/mol.