Health, 01.08.2019 22:30 jybuccaneers2022

Which of the following must be the same before and after a chemical reaction? a) the sum of the masses of all substances involved. b) the number of molecules of all substances involved. c) the number of atoms of each type involved. d) both (a) and (c) must be the same.

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Which of the following must be the same before and after a chemical reaction? a) the sum of the ma...

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