Mole Ratios

Stoichiometry problems all contain information that is provided, as well as information that is unknown. You will need to take the given information and solve for the unknown. In some cases, the given and unknown are both reactants. Sometimes the given and unknown are both products. Other times one reactant is given along with one product. In earlier chemistry studies, you learned that the amount of substances can be expressed in moles. When the amount of a substance is not given in moles, you will need to convert to moles in order to solve for the unknowns. In this topic, you will focus on the type of stoichiometry problem where both the given and unknown quantities are expressed in moles.

Essential Question

• How are mole ratios used to determine the mole amounts of elements in a compound?