Relative Formula Mass

​Relative Formula Mass

​How to calculate the relative formula mass

Add together the Relative Atomic Mass for each atom in the formula.

​

e.g. H₂O 1 + 1 + 16​ = 18

e.g. Mg(OH)₂ 24 + 16 + 16 + 1 + 1 = 58​

Match

Match the atom to it's Relative Atomic Mass

• Magnesium

• Carbon

• Oxygen

• Sulphur

24

12

16

32

• 24

• 12

• 16

• 32

Dropdown

The Relative formula mass of CO₂ is ​

Select answer

Drag and Drop

The relative formula mass of C₄H₁₀ is ​

Placeholder

Drag these tiles and drop them in the correct blank above

58

56

60

62

Fill in the Blanks

The relative formula mass of Al(NO₃)₃ is

.