13. Caleulate the number of molecules in. a drop ofwater weighing 0.05 – InterviewSolution

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1.

13. Caleulate the number of molecules in. a drop ofwater weighing 0.05 g (H 1,0 16).

Answer»

calculate the number of molecules in a drop of water weighing...1)Molecular mass ofwater= 18 g.

2)No. of moles in0.05 gofwater= 0.05/18.

3) = 2.78 x 10-3mol.

4) = 1.67 x 1021molecules.

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