Question

Calculate the mass of 10²² atoms of sulphur.

[Atomic mass: S = 32, C = 12 and O = 16 and Avogadro's number = 6 × 10²³]

Answer 1

6.022 × 10²³ atoms of sulphur weight = 32 g

1 atom of sulphur weigh = `32/(6.022 xx 10^23)`

10²² atoms of sulphur weigh = `32/(6.022 xx 10^23) xx 10^22`

= 0.531 g