Question

11. Calculate the mass of 100 molecules of water​

Answer 1

Answer:

n=. 100/na(Avogadro's number)

n= mass /18

so

(100/Na)*18

Answer 2

Answer:

Mass of 1 molecule of H2O= H×2 + O×1

= 2 + 16

=18g

Therefore,

Mass of 100 molecules of H20= 18×100

= 1800g

= 1.8 kg