Question

11. Calculate number of molecules in each of the following:
(1) 14 g of nitrogen
(ii) 3.4 g of hydrogen sulphide (H2S).​

Answer 1

Answer:

1. 1molecule

2.2. molecules

Answer 2

Answer:

i)No. of moles of oxygen=14/28

=0.5moles

no. of molecules=0.5×6.022×10^23

=3.011×10^23 molecules..

ii)No. of moles of H2S=3.4/38

=0.08moles

no. of molecules=0.08×6.022×10^23

=0.48×10^23 molecules...