Question: how many hydrogen atoms are present in 32 amu of methane?
Answer: Methane (CH4) has a molar mass of 16g/mol . So, 32g of methane will be 2 moles of it. Know that, hydrogen has a molar mass of around 1g/mol . In methane, there are four hydrogen atoms, so the total mass of hydrogen is 4g/mol in methane, which is 14 of the mass of methane.