Question

Gram molecular mass of a substance is

Answer 1

Gram molecular mass(GMM):

• The mass of one mole of a molecular substance in the unit of grams is called gram molecular mass.
• It is the sum of all the atomic masses in the molecular formula.
• For example, if the atomic mass of $\mathrm{H}$ is 1, and the atomic mass of $\mathrm{O}$ is 16, the gram molecular mass of ${\mathrm{H}}_2\mathrm{O}$ (${\mathrm{H}}_2\mathrm{O}$ molecule contains one hydrogen atom and one oxygen atom)

$$\begin{gathered} \mathrm{GMM}=(1\times 2)+16 \\ \mathrm{GMM}=18\mathrm{g} \end{gathered}$$