Question

convert 28 molecules of ammonia gas into mole

Answer 1

Mass of NH3 = 17gm = 1 mole

So, 28gm NH3 = x mole

So, x = 28/17

= 1.64 mole.

Answer 2

6.023×10^23 molecules contain 1 mol
→ 28 molecules contain 1×28/6.023×10^23 mol = 28/ Avogadro no.