Question

Define mole and calculate the mass of 5 mole of oxygen gas

Answer 1

Explanation:

The mole is the unit of measurement for amount of substance in the International System of Units.

(i) n = 0.5 mole; Molar mass(M) of oxygen = 16 x 2 = 32 g.

Since, mass of 1 mole of oxygen = 32.

So, mass of 0.5 mole = m = 0.5 x 32.

= 16 g.

(ii) No. of atoms, N = 3.011 x 1023 ; N0 = 6.022 x 1023 ; molar mass, M = 16 g.