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 mole concept?

Back

The mole is a unit of measurement in chemistry that represents 6.022 x 10²³ particles (atoms, molecules, ions, etc.). It allows chemists to count quantities of substances.

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. For example, C6H12O6 has a molar mass of 180.18 g/mol.

Front

What is the balanced equation for the reaction of sodium with water?

Back

2Na + 2H2O → 2NaOH + H2.

Front

How many grams of hydrogen are produced from 120 g of sodium?

Back

5.2 g of hydrogen are produced.

Front

What is the relationship between moles of reactants and products in a balanced equation?

Back

The coefficients in a balanced equation indicate the ratio of moles of reactants to products.

Front

How many moles of iron can be produced from 6 moles of hydrogen in the reaction Fe2O3 + 3H2 → 2Fe + 3H2O?

Back

4 moles of iron can be produced.

Front

What is the stoichiometric conversion factor?

Back

The stoichiometric conversion factor is derived from the coefficients of a balanced chemical equation and is used to convert between moles of reactants and products.

Front

How many grams of oxygen are needed to react with 56.8 grams of ammonia in the reaction 4NH3 + 5O2 → 4NO + 6H2O?

Back

133.33 g of oxygen are needed.

Front

What is the molar mass of glucose (C6H12O6)?

Back

The molar mass of glucose is 180.18 g/mol.