Stoichiometry Practice

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 Na₂SO₄?

Back

The molar mass of Na₂SO₄ is approximately 142.04 g/mol.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol).

Front

What is the balanced equation for the reaction of sodium hydroxide with sulfuric acid?

Back

2NaOH(aq) + H₂SO₄(aq) → 2H₂O(l) + Na₂SO₄(aq)

Front

How many grams of Na₂SO₄ are produced from 200 grams of NaOH?

Back

297.65 g Na₂SO₄ are produced.

Front

What is the stoichiometric ratio of NaClO₃ to O₂ in the reaction 2NaClO₃ → 2NaCl + 3O₂?

Back

The stoichiometric ratio is 2:3.

Front

How many moles of O₂ are produced from 12.00 moles of NaClO₃?

Back

576 g of O₂ are produced.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10²³, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

How do you calculate the number of moles from grams?

Back

To calculate the number of moles from grams, divide the mass of the substance (in grams) by its molar mass (in g/mol).

Front

What is the balanced equation for the decomposition of KClO₃?

Back

2 KClO₃ → 2 KCl + 3 O₂.