Question

The mass of a given substance is represented by the number of moles of the substance into the molar mass of the substance.

• A. True
• B. False

Answer 1

The correct option is A True

A mole of a substance contain $6.022\times {10}^{23}$ particles. The mass of a mole of particles depend on the mass of individual particle. The molar mass of a substance is the mass of one mole of particles in gram.

For example, if we have to calculate the mass in grams of 0.7 moles of sodium.

The gram atomic mass of sodium is 23 g.

Mass of 0.7 moles of sodium = 0.7 $\times$ 23 = 16.1 g.