Question

Calculate the number of molecules in the following. 0.05mole of O2

Answer 1

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Answer 2

Answer:

Molecular mass of water = 18 g

The number of moles of water=n=Molecular wt.weight=180.05=2.78×10−3

Now, number of molecules of water=n×6.022×1023

=2.78×10−3×6.022×1023

=1.67×1021 molecules