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 does a balanced chemical equation represent?

Back

A balanced chemical equation represents the equal number of atoms for each element in the reactants and products, ensuring mass is conserved.

Front

How do you determine the number of moles from grams?

Back

To determine the number of moles from grams, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the mole ratio in a chemical reaction?

Back

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

Front

Given the reaction 2H₂ + O₂ → 2H₂O, how many moles of water are produced from 4 moles of hydrogen?

Back

4 moles of hydrogen produce 4 moles of water.

Front

In the reaction N₂ + 3H₂ → 2NH₃, how many moles of hydrogen are needed for 1 mole of nitrogen?

Back

3 moles of hydrogen are needed for 1 mole of nitrogen.

Front

What is the molar mass of Ca(OH)₂?

Back

The molar mass of Ca(OH)₂ is approximately 74.09 g/mol.

Front

How many grams of O₂ are produced from 12 moles of NaClO₃ in the reaction 2NaClO₃ → 2NaCl + 3O₂?

Back

576 grams of O₂ are produced.

Front

In the reaction Mg + 2HCl → MgCl₂ + H₂, how many moles of HCl are needed for 7.5 moles of MgCl₂?

Back

15 moles of HCl are needed.

Front

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

Back

The coefficients indicate the number of moles of each substance involved in the reaction.