Question

if one mole of oxygen weight 16gm. calculate the mass of 1 atom of oxygen.

Answer 1

Mass of 1 atom = gram atomic mass / avogadro's number
       
                         = 16 / 6.022 x 10²³
                         = 2.66 x 10-²³g

Answer 2

Hi there!!


One mole of Hydrogen = 6.022 × 10²³ atoms


But 1 mole = 16 grams

16 grams of Hydrogen has 6.022 × 10²³ atoms

Or in other words ,
6.022 × 10²³ atoms has a mass of 16 grams

Therefore ,
Mass of 1 atom = 16 ÷ 6.022 × 10²³
= 2.66 x 10⁻²³grams