Question

Calculate the mass of 50 molecules of water?​

Answer 1

Answer:

The molecular weight of water is 18 g/mol. Hence, one mole of water weighs 18 g.

One mole of water contains 6.023×10

23

water molecules.

Mass of one water molecule =

6.023×10

23

18

=2.988×10

−23

Answer 2

Answer:

A mole of water containing 50 % of H2O and 50 % of D2O weighs 218+20=19 g.