The number of molecules in 100ml of 0.02N H2SO4 is

Question

The number of molecules in 100ml of 0.02N H2SO4 is (A) 6.02× 1020 (B) 6.02× 1016 (C) 6.02× 1022 (D) 6.02× 1021

Tardigrade Admin · Accepted Answer

Normality = Molarity × valency factor (n) 0.02=M× 2 Molarity =(N o . o f m o l e s/V o l u m e i n l i t r e) 0.01=(n/0.1)=n=0.001 1 mole of H2SO4 contains 6.023× 1023 molecules. So, 0.001 mole contains 6.023× 1020 molecules.

Q. The number of molecules in 100ml of $0.02 N$ $H_{2} S O_{4}$ is

$6.02 \times 1 0^{20}$

$6.02 \times 1 0^{16}$

$6.02 \times 1 0^{22}$

$6.02 \times 1 0^{21}$

Normality $=$ Molarity $\times$ valency factor (n)
$0.02 = M \times 2$
Molarity $= \frac{N o . o f m o l es}{V o l u m e in l i t re}$
$0.01 = \frac{n}{0.1} = n = 0.001$
1 mole of $H_{2} S O_{4}$ contains $6.023 \times 1 0^{23}$ molecules.
So, 0.001 mole contains $6.023 \times 1 0^{20}$ molecules.

Q. The number of molecules in 100ml of 0.02N H2​SO4​ is

6.02×1020

6.02×1016

6.02×1022

6.02×1021