Question

parsentage composition of h2so4

Answer 1

total number of atoms = 2+1+4 = 7

so % composition of H =
$\frac{2}{7} \times 100$

= 28.571

% composition of S =
$\frac{1}{7} \times 100$
=14.285

and % composition of O =

$\frac{4}{7} \times 100$
=57.142

to check if it's correct, add them all, if you get 100, it means you have made no mistake in calculations.

so →
28.571+14.285+57.142 =
99.99800

(this is because we have taken answer up to 3 decimal only, so this answer is also correct)