1.

If 1 ml of water contains 20 drops. Then no. of molecules in a drop of water is

Answer»

`6.023xx10^(23)` molecules
`1.376xx10^(26)` molecules
`1.344xx10^(18)` molecules
`4.346xx10^(20)` molecules

Solution :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.


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