Question

Calculate number of molecules in 4.25gm of ammonia gas

Answer 1

l hope ..it us useful

Answer 2

No. Of moles of ammonia = given mass/actual mass
So = 4.25/17
=0.25 moles
Now,
No. Of molecule =no. Of mole *avagadros no.

$6.022 \times {10}^{ 23} \times 0.25$
=1.505*10^23