The number of molecules in 100 mL of 0.02 `NH_(2)SO_(4)` is:

Answer

C

Explanation

Normality = n `xx` Molarity
For acids, n = Basicity
For `H_(2)SO_(4), n=2`
`0.02N =2 xx` Molarity
or Molarity of 0.02 N `H_(2)SO_(4) = 0.02/2 = 0.01` M
`therefore` Number of moles in 100 mL solution
`=0.01/1000 xx 100`
= 0.001 moles
Number of molecules in 0.001 moles
`=6.022 xx 10^(23) xx 0.001`
`=6.022 xx 10^(20)` molecules.