Question

If 1 ml of water contains 20 drops. Then no. of molecules in a drop of water is
A. `6.023xx10^(23)` molecules
B. `1.376xx10^(26)` molecules
C. `1.344xx10^(18)` molecules
D. `4.346xx10^(20)` molecules

Answer 1

Correct Answer - C
22400 ml of water contains `=6.023xx10^(23)` molecules
1 ml of water contains `=(6.023xx10^(23))/22400` molecules
`=20` drops
`:.` 1 drop of water will contain `=(6.023xx10^(23))/(224xx2xx10^(3))`
`=1.344xx10^(18)` molecules.