Question

A sample of H^2SO^4 contains 4 moles of oxygen atom then find number of sulphur atom in sample?

Answer 1

Answer:

The mole is basically just a large number that you can use instead of e.g. the number 1,000,000 or the number 0.5. So in your question, $\pu{1.3 mol}$ of $\ce{H2SO4}$ means that you have $1.3 \times 6.022 \times 10^{23}$ molecules of $\ce{H2SO4}$, each of which contains one sulphur atom, two hydrogen atoms and four oxygen atoms.