Introduction to 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 balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, reflecting the law of conservation of mass.

Front

What is a limiting reactant?

Back

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

Front

How do you determine the limiting reactant in a reaction?

Back

To determine the limiting reactant, compare the mole ratio of the reactants used in the reaction to the mole ratio in the balanced equation.

Front

What is the mole concept?

Back

The mole is a unit in chemistry that represents 6.022 x 10^23 particles (atoms, molecules, ions, etc.) of a substance.

Front

How do you convert moles to molecules?

Back

To convert moles to molecules, multiply the number of moles by Avogadro's number (6.022 x 10^23).

Front

What is the mole ratio in a balanced equation?

Back

The mole ratio is the ratio of the coefficients of the reactants and products in a balanced chemical equation.

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 and are essential for stoichiometric calculations.

Front

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

Back

3 moles of H2 are needed.

Front

What is the formula for calculating moles from mass?

Back

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