Stoichiometry Chapter Review

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 it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation, reflecting the law of conservation of mass.

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement in chemistry that represents 6.02 x 10^23 particles (atoms, molecules, etc.) of a substance.

Front

How do you calculate the number of molecules in a given number of moles?

Back

To calculate the number of molecules, multiply the number of moles by Avogadro's number (6.02 x 10^23).

Front

What is a limiting reactant?

Back

A limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

Front

What is an excess reactant?

Back

An excess reactant is a substance that is not completely used up in a chemical reaction, remaining after the reaction has finished.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (in g/mol).

Front

What is the molar mass of carbon (C)?

Back

The molar mass of carbon (C) is approximately 12.01 g/mol.

Front

How many grams are in 2 moles of water (H₂O)?

Back

To find the grams in 2 moles of water, multiply 2 moles by the molar mass of water (18.02 g/mol), resulting in approximately 36.04 g.

Front

What is the balanced equation for the combustion of propane (C₃H₈)?

Back

The balanced equation is C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O.