Stoichiometry

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

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 of the equation.

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 N₂ + 3H₂ → 2NH₃, how many moles of H₂ are needed for 2 moles of N₂?

Back

6 moles of H₂ are needed.

Front

What is the balanced equation for the reaction of calcium carbide with water?

Back

CaC₂ + 2H₂O → C₂H₂ + Ca(OH)₂.

Front

How many grams of O₂ are produced from the decomposition of 2NaClO₃?

Back

576 grams of O₂ are produced from 12.0 moles of NaClO₃.

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 do you calculate the mass of a substance from moles?

Back

Mass (g) = Moles × Molar Mass (g/mol).

Front

What mass of O₂ is required to burn 36.1 g of B₂H₆?

Back

124 g of O₂ is required.