Stoich Practice

Front

What is stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions.

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10²³ particles (atoms, molecules, etc.).

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides.

Front

What is the mole ratio in a balanced equation?

Back

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Front

What is the balanced equation for the combustion of ethane (C2H6)?

Back

The balanced equation is 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O.

Front

How many moles of water are produced from 4 moles of NH3 in the reaction 4NH3 + 5O2 → 4NO + 6H2O?

Back

6 moles of water are produced.

Front

What is the mole ratio of CO2 to H2O in the combustion of ethane?

Back

The mole ratio of CO2 to H2O is 2:3.

Front

How many moles of N2 are needed to react with 6 moles of H2 in the reaction N2 + 3H2 → 2NH3?

Back

2 moles of N2 are needed.

Front

What is the significance of coefficients in a balanced equation?

Back

Coefficients indicate the number of moles of each substance involved in the reaction.