Question

Define the percentage composition of an element in a compound.

Answer 1

Percentage composition:

• The percentage composition of an element is the mass percentage of that element present in a specific compound.
• To calculate the percentage composition by mass, divide the mass of the element in one molecule of a compound by the gram molecular mass of the compound. It is then multiplied by $100$.

Mathematical Formula:

• The formula for percentage composition by mass is as follows:

$\mathrm{Percentage}\mathrm{composition}\mathrm{by}\mathrm{mass}=\frac{\mathrm{Mass}\mathrm{of}\mathrm{the}\mathrm{element}\mathrm{in}\mathrm{one}\mathrm{molecular}\mathrm{of}\mathrm{a}\mathrm{compound}}{\mathrm{Gram}\mathrm{molecular}\mathrm{mass}\mathrm{of}\mathrm{the}\mathrm{compound}}\times 100$