Question

convert into mole

20 gram of water​

Answer 1

We know, 1 mole H2O = 18g

So, x mole H2O = 20g

•••••••••••••••••••••••••••••••••••••••

20 × 1 = x × 18

x = 20/18 = 1.11 mole

Answer 2

Explanation:

1 gram =molecular weight

water molecular weight=18(approx)

hence

1 mole=18

x mole=20

By cross multiplication

18x=20

x=20/18=1.1 mole