1 3p 2 3d 4 0 2 (g) + 10 H 2 S0 4 produce 1 mol of CH 4 (g) and AH = H products - H reactants. 10.3.2 Enthalpy, H Reactants AH Products Progress of Reaction 10.6.1 Example One example of an ionic compound Magnesium atom 2 Fluorine atoms 2 . The graph below shows the relative molecular mass (R.M.M.) is.