Law of Conservation of Mass

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Presentation transcript:

Law of Conservation of Mass

Review/ Instructions Mass is neither created nor destroyed during a chemical reaction- it is conserved Mass reactants = Mass products Use your knowledge of the Conservation of mass to answer the following questions.

Problems 1) 2 Cu + O2  2CuO When 127 g of copper reacts with 32 g of oxygen gas to form copper (II) oxide, no copper or oxygen is left over. How much copper (II) oxide is produced? Ca + ZnCO3  CaCO3 + Zn 64 g 192g 152g ? According to the law of conservation of mass, how much zinc was present in the zinc carbonate? CaCO3  CaO + CO2 100g 65g ? According to the law of conservation of mass, how much carbon dioxide was produced?