Stoichiometry Basics (2024)

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 mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance, defined as containing exactly 6.022 x 10²³ particles (atoms, molecules, ions, 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; the total mass of reactants equals the total mass of products.

Front

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

Back

The mole ratio is determined from the coefficients of the balanced chemical equation, indicating the proportion of moles of each substance involved in the reaction.

Front

Given the reaction 2H₂ + O₂ → 2H₂O, how many moles of water are produced from 8 moles of O₂?

Back

16 moles of water are produced.

Front

In the reaction Fe₂O₃ + 3H₂ → 2Fe + 3H₂O, how many moles of iron can be produced from 9 moles of H₂?

Back

6 moles of iron can be produced.

Front

For the reaction 4NH₃ + 6NO → 5N₂ + 6H₂O, how many moles of N₂ can be produced from 10.0 moles of NH₃?

Back

12.5 moles of N₂ can be produced.

Front

What is the molar mass of CO₂?

Back

The molar mass of CO₂ is 44.01 g/mol.

Front

If 35g of O₂ reacts in the reaction CH₄ + 2O₂ → 2H₂O + CO₂, what is the mass of CO₂ produced?

Back

24.1 g of CO₂ is produced.

Front

In the reaction 4NH₃ + 5O₂ → 4NO + 6H₂O, how many moles of H₂O are produced from 12 moles of NH₃?

Back

18 moles of H₂O are produced.