Question

Find the formula unit mass of potassium chloride (KCl).

Atomic mass- $$(\mathrm{K}=39 \mathrm{u} ; \mathrm{Cl}=35.5 \mathrm{u})$$.

Answer 1

Formula unit mass of KCl = (1 × 39 u) + (1 × 35.5 u) = 74.5 u.