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Which procedure can be used to demostrate experimentally that this reaction obeys the Law of Conservation of Matter?
2 Mg (s) + O2 (g) → 2 MgO (s)
(A) Take a mass of 1.0000 g of Mg ribbon, burn it in pure O2 , and compare the mass of the product with the original mass of the Mg.
(B) Show that the sum of two atomic molar masses of Mg plus one molecular mass of O2 is equal to two formula molar masses of MgO.
(C) Determine the mass of a sealed flash-bulb containing magnesium and oxygen, ignite the mixture, cool, and compare the final mass of bulb plus contents with the original mass of the bulb plus contents.
(D) Burn 1.0000 g of Mg ribbon in a tall beaker filled with air, scrape out all the MgO formed and compare with the original mass of the Mg.
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