Question

the number of molecules present in 40 g of ammonia

Answer 1

Answer:

1.41

Explanation:

no of moles =weight/gram molecular weight

=40/17

=2.35

note: molecular weight ammonia(NH3)=14+3=17

number of molecules =(no of moles)×(avagadaro number)

note::avagadaro number = 6.023×10^23

number of molecules =2.35/6.023×10^23

=1.41