Question

What is the molar mass of a substance

Answer 1

Molar mass is the mass of one mole of that substance. atomic mass of an element in atomic mass units is equal to the molar mass of that substance in grams.

Answer 2

Explanation:

An atom or object that occupies space also has mass. Molar mass or molecular weight is the mass of 1 mole of a substance.

The formula to calculate molar mass is as follows.

            $Molar mass = \frac{mass in grams}{mole}$

For example, molar mass of $Na_{2}CO_{3}$ will be as follows

       $2 \times mass of sodium atom + 1 \timess mass of carbon atom + 3 \times mass of oxygen atom$

     =  $(2 \times 22.99 + 1 \timess 12.01 + 3 \times 16.00$)  g/mol

    = (45.98 + 12.01 + 48.00) g/mol

    = 105.99 g/mol

Therefore, it can be concluded that the sum of mass of all the atoms in grams make up 1 mole of a particular molecule. This mass is known as the molar mass or molecular weight.