Moles

Question 1

mass

Answer 1

mr.mole

Mr/Ar x mole

Question 2

mole

Answer 2

Mass / mr

Question 3

Percentage yield

Answer 3

Actual amount made/ theoretical amount ( found through reacting masses calculations) x 100 = percentage yield

Question 4

empirical formulae

Answer 4

smallest ratio of atoms

Question 5

Understand how the formulae of simple compounds can be obtained experimentally

Answer 5

• weigh some pure magnesium
• Heat magnesium to a burning to make Magnesium oxide
• weigh the mass of magnesium oxide

Question 6

reasons there isnt alway 100% percentage yield

Answer 6

• some product may be lost when separating from reaction mixture
• reactants may act in a different way then expected
• reversible reactions may not go until completion