Question

Molecular mass is defined as the

• A. Mass of an atom compared with the mass of one molecule
• B. Mass of an atom compared with the mass of an atom of Hydrogen
• C. Mass of one molecule of any substance compared with the mass of an atom of C-12
• D. Mass of an atom compared with the mass of an atom of Oxygen

Answer 1

The correct option is C Mass of one molecule of any substance compared with the mass of an atom of C-12

Mass of one molecule of any substance compared with the mass of an atom of C-12.

Molecular mass: the mass of a molecule that is equal to the sum of the masses of all the atoms contained in the molecule.It is used for those substances whose constituent particles are molecules.

For example The molecular mass of $C{O}_2$ =(1×atomic mass of carbon)+(2×atomic mass of oxygen)