Stoichiometry Practice Flashcard

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

Define 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 calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the compound's formula.

Front

What is the empirical formula?

Back

The empirical formula is the simplest whole-number ratio of elements in a compound.

Front

How do you determine the empirical formula from a molecular formula?

Back

Divide the subscripts in the molecular formula by their greatest common divisor.

Front

What is the balanced equation for the reaction of nitrogen and hydrogen to form ammonia?

Back

N2 + 3H2 → 2NH3.

Front

How many moles of hydrogen are needed to react with 1 mole of nitrogen?

Back

3 moles of hydrogen are needed to react with 1 mole of nitrogen.

Front

What is the relationship between moles and grams?

Back

The relationship is given by the formula: grams = moles × molar mass.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance by its molar mass.

Front

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

Back

Coefficients indicate the relative number of moles of each reactant and product involved in the reaction.