And the formula of sulfuric acid is H₂SO4. And this tells us that one molecule of sulfuric acid contains two hydrogen atoms, one sulfur atom and four oxygen atoms. Dr. Tim: Not quite.

The symbol for magnesium is Mg, and sulfuric acid is a compound containing sulfur, oxygen, and hydrogen. Its formula is written: H2SO4. So we write Mg plus H2SO4. An arrow shows the direction of ...