Suppose the chemists had chosen `10^20` as the number of particles in a mole. What would be the molecular mass of oxygen gas ?

Explanation

According to present concept of mole.
`6.022 xx 10^(23)` molecules of oxygen weigh = 32 g
`therefore` Mass of 1 molecule of oxygen `=32/(6.022 xx 10^(23))`
`=5.32 xx 10^(23)`g
If the mole contained `10^(20)` particles.
`=532 xx 10^(-23) xx 10^(20) = 5.32 xx 10^(-3)`g
`therefore` Molecular mass of oxygen `=5.52 xx 10^(-3)`g