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What is the mass of: (b) 0.5 mole of water molecules?

Q 9.     What is the mass of:

  (b)     0.5 mole of water molecules?

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The mass of 1 mole of water molecules = 18 g

Thus,

the mass of 0.5 mole of water molecules = 18 x 0.5

                                                                  = 9.0 g
 

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