4.5 Stoichiometry (AP Chemistry)

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 molar mass of CH₄ (methane)?

Back

The molar mass of CH₄ is 16 g/mol.

Front

How do you calculate moles from grams?

Back

Moles = mass (g) / molar mass (g/mol).

Front

In the reaction 1 CH₄ + 2 O₂ → 1 CO₂ + 2 H₂O, how many moles of CO₂ are produced from 1 mole of CH₄?

Back

1 mole of CO₂ is produced from 1 mole of CH₄.

Front

What is the mole ratio of KClO₃ to O₂ in the reaction 2 KClO₃ → 2 KCl + 3 O₂?

Back

The mole ratio is 2 moles of KClO₃ to 3 moles of O₂.

Front

How many moles of O₂ are produced from 6.7 moles of KClO₃?

Back

10.1 moles of O₂ are produced.

Front

In the reaction Fe₂O₃ + 3H₂ → 2Fe + 3H₂O, what is the mole ratio of H₂ to Fe?

Back

The mole ratio is 3 moles of H₂ to 2 moles of Fe.

Front

How many moles of Fe can be produced from 6 moles of H₂?

Back

4 moles of Fe can be produced.

Front

What is the molar mass of Na (sodium)?

Back

The molar mass of Na is approximately 23 g/mol.

Front

In the reaction 2Na + 2H₂O → 2NaOH + H₂, how many grams of H₂ are produced from 120 g of Na?

Back

5.2 g of H₂ are produced.