Stoichiometry

Composition- deals with the mass relationships of elements in compounds.

Reaction- Involves the mass relationships between reactants and products in a chemical reaction

Type 1: Given and unknown quantities are amounts in moles. Amount of given substance(mol) to amount of unkwown substance(mol)

Type 2: Given is an amount in moles, and unknown is a mass that is often expressed in grams. Amount of given substance(mol) to amount of unknown substance(mol) to mass of unknown substance(g)

Type 3: Given is a mass in grams, and unkown is an amount in moles. Mass of given substance(g) to amount of given substance(mol) to amount of unknown substance(mol)

Type 4: Given is a mass in grams, and unkwown is a mass in grams. mass of given substance(g) to amount of given substance(mol) to amount of unknown substance(mol) to mass of unknown substance(g)

A mole ratio is a conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction

4 mol Al/ 2 mol Al₂O₃

In a spacecraft, the carbon dioxide exhaled by astronauts can be removed by its reaction with lithium hydroxide, LiOH, according to the following chemical equation.

CO₂ (g)+ 2LiOH(s) --> Li₂CO₃(s) + H₂O(l)

How many moles of lithium hydroxide are required to react with 20 mol CO₂, the average amount exhaled by a person each day?

In photosynthesis, plants use energy from the sun to produce glucose, C₆H₁₂O₆, and oxygen from the reaction of carbon dioxide and water.

What mass, in grams, of glucose is produced when 3 mol of water reacts with carbon dioxide?