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  1. The empirical formula of a compound merely gives the ratio of atoms in the compound based on experimental evidence (such as H2O for water or HO for hydrogen peroxide). When magnesium and oxygen are heated together, they react: magnesium + oxygen magnesium oxide Rxn 1

  2. To determine the empirical formula of magnesium oxide, you will react elemental magnesium with elemental, atmospheric oxygen, to generate magnesium oxide. Mg(s) + O

  3. 5 sie 2011 · From the masses of magnesium and oxygen that combine, we can calculate the empirical formula of magnesium oxide. We will weigh the magnesium before it combines with the oxygen, and we will also weigh the product of the reaction, magnesium oxide.

  4. In this experiment, an analytical balance is used to determine the mass of magnesium ribbon and magnesium oxide. The mass of oxygen that reacts with magnesium is calculated by the difference between these two. The number of moles of each element and molar ratio in the product of magnesium oxide can then be calculated.

  5. Calculate the number of moles of magnesium and moles oxygen (O not O2). Ask a lab aide to check your values and then post your calculated number of moles magnesium and oxygen in the Google spreadsheet available on Moodle. Your molar results must be posted before the end of the lab period.

  6. Objectives: To synthesize a compound containing magnesium and oxygen, and to determine its empirical formula. Materials: Magnesium ribbon; Bunsen burner; crucible and lid; tongs; clay triangle; iron ring

  7. In this experiment the empirical formula of magnesium oxide will be found by reacting magnesium with oxygen to produce magnesium oxide. The mass of the reactant magnesium and the mass of the product magnesium oxide will be measured experimentally and used to calculate the empirical formula of magnesium oxide. Pre-lab Questions:

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