Magnesium metal is burned in the presence of atmospheric oxygen to form magnesium oxide. Student 1 data Mass Mg 0.1752 g 0.2927 g Mass after reaction Using the given data, calculate the stoichiometric ratio of magnesium ions to oxygen ions in this magnesium oxide sample. Express the ratio as a decimal. Include four significant figures. decimal ratio: What is the empirical formula of magnesium oxide based on this data? empirical formula