CHM 161 Chapter 9: Stoichiometry and the Mole

stoichiometry

The relating of one chemical substance to another using a balanced chemical reaction.

mole (mol)

The number of things equal to the number of atoms in exactly 12 g of carbon-12; equals 6.022×10²³ things.

molar masses

The mass of 1 mol of a substance in grams.

mole-mole calculation

A stoichiometry calculation when one starts with moles of one substance and convert to moles of another substance using the balanced chemical equation.

mole-mass calculation

A calculation in which you start with a given number of moles of a substance and calculate the mass of another substance involved in the chemical equation, or vice versa.

mass-mass calculations

A calculation in which you start with a given mass of a substance and calculate the mass of another substance involved in the chemical equation.

theoretical yield

An amount that is theoretically produced as calculated using the balanced chemical reaction.

actual yield

The amount that is actually produced in a chemical reaction.

percent yield

Actual yield divided by theoretical yield times 100% to give a percentage between 0% and 100%.

limiting reagent

The reactant that runs out first.