Question

One mole of carbon atom weighs 12 g, the number of atoms in it is equal to, (Mass of carbon-12 is 1.9926 × 10^–23 g)

(1) 6.022 × 10²³

(2) 1.2 × 10²³

(3) 6.022 × 10²²

(4) 12 × 10²²

Answer 1

Answer - (1) 6.022 × 10²³

 

Solution - 

no. of particles = $12\over1.9926 × 10^{–23}$

                         = 6.022 × 10²³