Question

what is the percentage of oxygen in na2hpo3 sodium hydrogen phosphite​

Answer 1

Hi,

Here is your answer

To Find:

Percentage composition of oxygen in Na2HPO3

Solution:

Relative formula mass of Na2HPO3=46+1+31+48=126

Atomic mass of oxygen=16

Percentage of oxygen present in Na2HPO3 is given by  the formula

% of O=Atomic mass of oxygen/Relative formula mass of  Na2HPO3 ×100

% of O=16/126×100

% of O=0.127×100=12.7%

hope this helps you