the formula for carbon dioxide is CO 2. It has one carbon atom (relative atomic mass = 12.0) and two oxygen atoms (relative atomic mass = 16.0): M r of CO 2 = 12.0 + 16.0 + 16.0 = 44.0 It could ...

work out the total relative formula mass or relative atomic mass of the reactants. relative atomic mass of Zn = 65.4 relative formula mass of HCl = 1.0 + 35.5 = 36.5 total relative formula mass of ...