Question

Calculate the molecular mass of ${HNO}_3$.

Answer 1

The molecular mass of ${HNO}_3$
$=(1\times \text{atomic mass of H})$ + $(1\times \text{atomic mass of N})$ + $(3\times \text{atomic mass of O})$
$=(1\times 1)+(1\times 14)+(3\times 16)$
$=1+14+48=63u$.