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The density of a pure liquid (molecular ...

The density of a pure liquid (molecular mass = 80) is `1.5gm//ml`. If 4 ml of liquiid contains 60 drops. Then the numberof molecules per drop of liquid is given by : [Given : `N_(A) = 6 xx 10^(23)]`

A

`7.5 xx 10^(20)`

B

`1.33 xx 10^(21)`

C

`4 xx 10^(23)`

D

`2 xx 10^(22)`

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The correct Answer is:
A
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