Relative Molecular Mass

Relative molecular mass of...

​Cl₂

M_r of chlorine gas = (2 × 35.5) = 71

​Cl

A_r of chlorine atom = 35.5

Relative molecular mass of...

O₂

M_r of oxygen gas = (2 × 16) = 32

O

A_r of oxygen atom = 16

Relative molecular mass of...

HNO₃

M_r of nitric acid = 1 + 14 + (16 x 3) = 63

Relative molecular mass of...

HCl

M_r of hydrochloric acid = 1 + 35.5 = 36.5

Relative formula mass of...

(NH₄)₂CO₃

M_r of (NH₄)₂CO₃ = (14 × 2) + (1 × 4 ×2) + 12 + (16 × 3) = 96

Relative formula mass of...

MgSO₄.7H₂O

M_r of MgSO₄.7H₂O = 24 + 32 + (16 × 4) + (7 × 18) = 246