Question

8. A molecule of water is made up of 2 atoms ot hydrogen and 1 atom of oxygen. What per cent of the atom of a water molecules is oxygen?



answer 33 1/3​

Answer 1

Water $\tt{H_2O}$ :-

We can clearly see that ,

in water there are 2 Atoms of Hydrogen and one Atom of Oxygen.

And

Total Mass of water is = 18u

H = 2u

O = 16u

•°•

O contribution % is $\implies{\tt \dfrac{16}{18}×100}$

$\large\implies{\tt 88.88\%}$

Also ,

We can calculate % of H contribution :

$\large\implies{\sf \dfrac{2}{18}×100 }$

$\large\implies{\sf 11.11\%}$

______________________________________

•°• Contribution of Oxygen in one mole of water is 88.88%

And

Contribution of Hydrogen in one mole of water is 11.11%