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 conservation of mass.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

How do you calculate the molar mass of a compound?

Back

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

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement in chemistry that represents 6.022 x 10^23 particles (atoms, molecules, etc.).

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 balanced equation for the reaction of iron and sulfur to form iron sulfide?

Back

The balanced equation is: Fe (s) + S (l) → FeS (s).

Front

How many moles of hydrogen are needed to react with 1 mole of nitrogen in the reaction N2 + 3H2 → 2NH3?

Back

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

Front

What is the stoichiometric ratio in the reaction 2Na + 2H2O → 2NaOH + H2?

Back

The stoichiometric ratio is 2:2:2:1 for Na:H2O:NaOH:H2.

Front

How do you determine the limiting reactant in a chemical reaction?

Back

The limiting reactant is the substance that is completely consumed first, limiting the amount of product formed.

Front

What is the theoretical yield in a chemical reaction?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, calculated based on stoichiometry.