Question

Gram molecular mass is:

• A. the mass of a molecule expressed in grams.
• B. same as molecular mass where unified mass(u) is replaced by grams.
• C. the molar mass of a molecule in grams.
• D. sum of the atomic mass of all atoms of that molecule.

Answer 1

The correct option is C the molar mass of a molecule in grams.

Gram molecular mass is equal to the molecular weight of a substance or the sum of all the atomic masses in its molecular formula. It is equal to molecular mass of a molecule in grams.

For example; Gram molecular weight of carbon dioxide $\left(C{O}_2\right)$ is :

$12+(2\times 16)$

$=12+32$

$=44$ grams.