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Question

Calculate the mass of 0.2moles of water.O=16,H=1


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Solution

Step 1: Given information

0.2moles of waterH2O

Step 2: Calculation of molecular weight of waterH2O

Molecular weight of water

=2×H+O=2×1+16g=18g

Step 3: Calculation of mass of 0.2moles of water

Mass of 1mol of water is 18g.

Mass of 0.2moles of water is 181×0.2=3.6g

Hence, the mass of 0.2moles of water is 3.6g.


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