Question

Define the following terms:

(iii) Relative Molecular Mass (molecular weight)

Answer 1

Relative Molecular Mass (molecular weight): Molecular mass is a number that indicates how many times one molecule of a substance is heavier in comparison to $\left(\frac{1}{16}\mathrm{th}\right)$ the mass of an oxygen atom or $\left(\frac{1}{12}\mathrm{th}\right)$of the mass of one atom of carbon-12.
Relative molecular mass=$\frac{\mathrm{Mass}\mathrm{of}\mathrm{one}\mathrm{molecule}\mathrm{of}\mathrm{the}\mathrm{substance}}{\left({\displaystyle \frac{1}{12}}\mathrm{th}\right)\times \mathrm{mass}\mathrm{of}\mathrm{one}\mathrm{atom}\mathrm{of}\mathrm{carbon}-12}$