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The density of a pure liquid (molecular mass =80) is 1.5 gm/ml. if 4 ml of liquid contains 60 drops then the number of molecules per drops of liquid is give by : [Given `N_(A)=6xx10^(23)`]A. `7.5xx10^(20)`B. `1.33 xx10^(21)`C. `4xx10^(23)`D. `2xx10^(22)` |
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Answer» Correct Answer - A `d=M/V` M=4x 1.5 =6gm 6 gm have 60 drops 1 drop will have 0.1 gm `n=0.1/8xx6xx10^(23) =7.5xx10^(20)` molecules |
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