Stoichiometry

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 balanced chemical equation.

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 mole ratio?

Back

The mole ratio is the ratio of the coefficients of any two substances in a balanced chemical equation, used to convert between moles of reactants and products.

Front

What is the purpose of a balanced chemical equation in stoichiometry?

Back

A balanced chemical equation provides the mole ratios needed to calculate the amounts of reactants and products involved in a chemical reaction.

Front

How many moles of I2 are produced from 0.4235 mol of CuCl2 in the reaction 2CuCl2 + 4KI → 2CuI + 4KCl + I2?

Back

1.28 × 10^23 molecules of I2 are produced.

Front

What is molar mass?

Back

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

Front

How do you find the number of molecules from moles?

Back

To find the number of molecules from moles, multiply the number of moles by Avogadro's number (6.022 × 10^23 molecules/mol).

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 × 10^23, which is the number of atoms, ions, or molecules in one mole of a substance.

Front

What is the significance of the coefficients in a balanced equation?

Back

The coefficients in a balanced equation indicate the relative number of moles of each substance involved in the reaction.

Front

When do you use molar mass in stoichiometry problems?

Back

You use molar mass when converting between grams and moles in stoichiometry problems.