chem calculations

percentage mass of an element in a compound=(Ar x moles of the element) ÷ Mr of compound)) x 100

balancing equations using the mole:

1. divide mass of each substance by Mr to find mole number

2. divide mole number of each substance by smallest mole number

3. if numbers arent whole multiply numbers until theyre whole

4. put numbers in front of its chemical formula

limiting reactants:

reactant thats used…