Question

If 1 mole were to contain 1*10^(4) particle, what would be the mass of one mole of oxygen?

Answer 1

1 mole of Oxygen contains 32gms which contain 6.022 x 10²³ particles.
one mole contains 1x 10⁴ particles -----? [mass of one mole of o2]

6.022x 10²³ particles ------ 32gm of O2
1x10⁴ partcles ----?
=32x10⁴/6.022 x 10²³
=5.31 x 10 ⁻¹⁹ gm

Thus mass of 1 mole of O2= 5.31 x 10 ⁻¹⁹ gm

Hope the question is correct.