1.

Oridinary water contain one part of heavy water per 6000 parts of water by weight. The number of heavy water molecules present in a drop of water of volume 0.01 mL is (density of water 1 g/mL)

Answer»

`2.5XX10^(16)`
`5xx10^(17)`
`5xx10^(16)`
`7.5xx10^(16)`

ANSWER :C


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