Stoichiometry 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 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

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 molar mass of a compound?

Back

The molar mass of a compound is the sum of the atomic masses of all the atoms in its formula, expressed in grams per mole (g/mol).

Front

How do you convert moles of one substance to moles of another in a reaction?

Back

Use the coefficients from the balanced chemical equation to set up a mole ratio between the two substances.

Front

What is the mole ratio in the reaction: 2 H2 + O2 → 2 H2O?

Back

The mole ratio is 2:1:2 for H2:O2:H2O.

Front

How do you calculate the mass of a product formed in a reaction?

Back

First, convert the moles of reactant to moles of product using the mole ratio, then convert moles of product to grams using its molar mass.

Front

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

Back

Coefficients indicate the relative number of moles of each substance involved in the reaction.

Front

How do you find the limiting reactant in a chemical reaction?

Back

The limiting reactant is the substance that is completely consumed first, limiting the amount of product formed. It can be found by calculating the moles of each reactant and comparing them using the mole ratios.

Front

What is the theoretical yield in a chemical reaction?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, based on stoichiometric calculations.