Class 11 NEET Chemistry Some Basic Concepts Of Chemistry

Number of moles of H2=‌

1

2

=0.5
Number of molecules of H2=0.5NA.
(1) Number of moles of N2=‌

14

28

=0.5
Number of molecules of N2=0.5NA
(2) Number of moles of H2O=‌

18

18

=1
Number of molecules of H2O=1×NA=NA
(3) Number of moles of CO=‌

16

28

=‌

4

7

Number of molecules of CO=‌

4

7

NA
(4) Number of moles of N2=‌

28

28

=1
Number of molecules of N2=1×NA=NA