Answer:
Volume
of drop of water == 1.0 mL
Density of water = 1.0 g/mL
Mass of drop of water =
Volume x Density = 1.0 g
Molecular mass of 
=
2 x 1 u + 1 x 16 u = 18 u Gram molecular mass of water == 18 g/mol 18 g of
water contains = 6.022 x 1023 molecules
1 g of water contains 
molecules = 3.34 x 1022
molecules
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