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 balanced equations.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

What is the mole concept?

Back

The mole is a unit in chemistry that represents 6.02 x 10^23 particles (atoms, molecules, ions, etc.) of a substance.

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 molar mass of magnesium (Mg)?

Back

The molar mass of magnesium (Mg) is approximately 24.31 g/mol.

Front

What is the molar volume of a gas at STP?

Back

The molar volume of a gas at standard temperature and pressure (STP) is 22.4 liters.

Front

How do you find the number of moles from volume at STP?

Back

To find the number of moles from volume at STP, divide the volume of the gas (in liters) by 22.4 L/mol.

Front

What is the stoichiometric ratio?

Back

The stoichiometric ratio is the ratio of moles of reactants to products as indicated by the coefficients in a balanced chemical equation.

Front

What is the significance of coefficients in a balanced equation?

Back

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

Front

How do you calculate the mass of a reactant needed for a reaction?

Back

To calculate the mass of a reactant needed, use the stoichiometric ratio from the balanced equation and the molar mass of the reactant.