Question

Find out the number molecules in each of the following molecule:
1)2g O2 ( 2)1g HCL​

Answer 1

Answer:

no of molecules = mass × NA(Avogadro number)

molar mass

1) no of molecules of O2= 2/32×6.023×10^23

2) no of molecules of HCL= 1/35× 6.023×10^23

Answer 2

"Answer:

32g of O2 will have 6.022 x 10^23 molecules

1 g of O2 will have ?

1g of O2 = 6.022/32 x 10^23

              = 0.18 x 10^23 molecules.

              = 1.8 x 10^23 molecules

36.5g of HCl will have 6.022 x 10^23 molecules

1g of HCl will have= 6.022/36.5 x 10^23 = 1.6 x 10^22 molecules

"