Stoichiometry Unit 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 a chemical reaction?

Back

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Front

How many moles of oxygen are produced from the decomposition of 2 moles of KClO3?

Back

According to the reaction 2 KClO3 → 2 KCl + 3 O2, 2 moles of KClO3 produce 3 moles of O2.

Front

If 6.7 moles of KClO3 decompose, how many moles of O2 are produced?

Back

10.1 moles of O2 are produced from 6.7 moles of KClO3.

Front

What is the balanced equation for the combustion of hydrogen?

Back

2 H2 + O2 → 2 H2O.

Front

How many moles of oxygen are consumed when 8 moles of H2 are used?

Back

4 moles of O2 are consumed.

Front

What must always be a reactant in a combustion reaction?

Back

Oxygen.

Front

What is the balanced equation for the reaction of sodium with water?

Back

2 Na + 2 H2O → 2 NaOH + H2.

Front

How many grams of hydrogen are produced from 120 g of Na?

Back

5.2 grams of hydrogen are produced.

Front

What is the balanced equation for the formation of aluminum oxide?

Back

4 Al + 3 O2 → 2 Al2O3.