Question

Chemistry :- 21 n 22 plz

Answer 1

calculate no of electron in one molecules of water. Formula is H2O so 2 electron from hydrogen and 10 electron from oxygen. This gives 10 electron from oxygen in a single molecules of H2O ( Water)

Step-by-step explanation:

So no of electron in 54 ml water is equal to 18×10^23×10=18×10^24

Answer 2

#21

Molecular mass of Water=18g

`\\ \sf\longmapsto No\:of\:moles=(Given\:mass)/(Molar\:mass)=(54)/(18)=3mol`

Now

• H has no neutrons hence one mol of water contain 8×Avagadros no of neutrons of Oxygen.
• 3mol of water will contain 3(8)=24×6.022×10^22 =1.806×10^25neutrons