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Chemistry, 09.11.2020 07:10 carolelai08

9. Which statement is always true about the law of conservation of mass? A. The total mass of the reactants is equal to the total mass of the products.
B. The mass of one reactant is equal to the mass of one product.
C. The total mass of a system changes in a chemical reaction.
D. The mass changes in a phase change, but not in a chemical reaction.

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