Question: how many oxygen atoms are present in h2so2?
Answer: So in your question, 1.3 mol of H2SO4 means that you have 1.3×6.022×1023 molecules of H2SO4, each of which contains one sulphur atom, two hydrogen atoms and four oxygen atoms. Thus, in one mole of H2SO4 you can find: 2 mol of hydrogen atoms.