Question 1
During the combustion of methane in oxygen, methane and oxygen react to form carbon dioxide and water. Which statement correctly represents the law of conservation of mass for this reaction?
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Chemistry · Unit 1 · Chemical reactions — reactants, products and energy change · Chemical reactions
State the law of conservation of mass.
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Question 2
A student burns 4.8 g of magnesium metal in oxygen gas to form magnesium oxide. When the magnesium oxide product is weighed, the mass is found to be 8.0 g. (a) State the law of conservation of mass. [1] (b) Explain why the mass of the product is greater than the mass of the magnesium that reacted. [1]
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Question 3
Which statement correctly expresses the law of conservation of mass?
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