how to determine the empirical formula of magnesium oxide experimentally?
['The ratio of atoms is the same as the ratio of moles. ... ', 'Mass of Mg = 0.297 g.', 'Mass of magnesium oxide = mass of Mg + mass of O.', '0.493 g = 0.297 g + mass of O.', 'Mass of O = (0.493 – 0.297) g = 0.196 g.', 'There is 1 mol of Mg for 1 mol of O .']