Stoichiometry 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 balanced chemical equation?

Back

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

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of the compounds in a chemical equation to indicate the relative amounts of each substance involved in the reaction.

Front

How do you determine the mole ratio from a balanced equation?

Back

The mole ratio is determined by the coefficients of the reactants and products in a balanced chemical equation.

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 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 ideal gas law?

Back

The ideal gas law is an equation of state for an ideal gas, expressed as PV=nRT, where P is pressure, V is volume, n is number of moles, R is the ideal gas constant, and T is temperature.

Front

What is the significance of the law of conservation of mass in stoichiometry?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, which is fundamental for balancing chemical equations.

Front

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

Back

At standard temperature and pressure (STP), 1 mole of an ideal gas occupies 22.4 liters. To find moles, divide the volume of gas by 22.4 L.

Front

What is the relationship between moles and volume in gas reactions?

Back

In gas reactions, the volume ratios of gases at the same temperature and pressure are equal to the mole ratios from the balanced equation.