Question

calculate the mass of 0.2 mole of water.)(Atomic mass of oxygen =16u, H=1u

Answer 1

Hi!!
1 mole of water = molecular mass of water in
grams
= mass of 2H atoms + mass of
O atom
= 2 × 1 + 16
= 2 + 16 =18 g
now, mass of 1 mole of water = 18g
so, mass of 0.2 mole of water = 18 × 0.2
= 3.6 g
the mass of 0.2 mole of water is 3.6 g



hope it's correct and helps you.........

Answer 2

1 mole of water = molecular mass of water in grams

= mass of 2H atoms + mass of

O atom

= 2 × 1 + 16

= 2 + 16 =18 g

now, mass of 1 mole of water = 18g

so, mass of 0.2 mole of water = 18 × 0.2= 3.6 g

the mass of 0.2 mole of water is 3.6 g