Stoich Practice

Front

What is stoichiometry?

Back

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

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10²³ particles (atoms, molecules, etc.).

Front

How do you calculate the number of moles from grams?

Back

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

Front

What is the balanced equation for photosynthesis?

Back

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.

Front

In the reaction 2NaClO₃ → 2NaCl + 3O₂, how many moles of O₂ are produced from 2 moles of NaClO₃?

Back

3 moles of O₂ are produced.

Front

What is the molar mass of O₂?

Back

The molar mass of O₂ is 32 g/mol.

Front

How many moles of H₂ are needed to react with 1 mole of N₂ in the reaction N₂ + 3H₂ → 2NH₃?

Back

3 moles of H₂ are needed.

Front

What is the stoichiometric coefficient in a balanced equation?

Back

The stoichiometric coefficient is the number placed before a compound in a balanced chemical equation that indicates the relative number of moles of that substance.

Front

How do you determine the limiting reactant in a chemical reaction?

Back

The limiting reactant is the substance that is completely consumed first, limiting the amount of product formed.

Front

What is the relationship between moles and volume at STP?

Back

At standard temperature and pressure (STP), 1 mole of any gas occupies 22.4 liters.