Stoichiometry Test 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 a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.02 x 10^23 particles (atoms, molecules, ions, etc.).

Front

How do you calculate moles from molecules?

Back

To calculate moles from molecules, divide the number of molecules by Avogadro's number (6.02 x 10^23).

Front

What is the molar mass of a substance?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How many moles of Fe can be produced from 6 moles of H2 in the reaction Fe2O3 + 3H2 → 2Fe + 3H2O?

Back

4 moles of Fe can be produced from 6 moles of H2.

Front

What is the relationship between moles and grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance.

Front

How many grams are in 0.89 moles of CaCl2?

Back

98.9 grams of CaCl2 are in 0.89 moles.

Front

What is the formula to convert atoms to moles?

Back

To convert atoms to moles, divide the number of atoms by Avogadro's number (6.02 x 10^23).

Front

How many grams of O2 are produced from 12 moles of NaClO3 in the reaction 2NaClO3 → 2NaCl + 3O2?

Back

576 grams of O2 are produced from 12 moles of NaClO3.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of particles in one mole of a substance.