What law says the total amount of substance at the beginning of a reaction must be equal to the amount of substance at the end of the reaction?
A. Law of Conservation of Heat
B. Law of Conservation of Moles
C. Law of Conservation of Mass
D. Law of Conservation of Energy
Answer (2)
The law governing the amount of substance in chemical reactions is the Law of Conservation of Mass , which states that matter is neither created nor destroyed. An example is the combination of hydrogen and oxygen to form water, where the mass before and after the reaction remains the same. This principle is essential for understanding chemical reactions. ;
The Law of Conservation of Mass states that the total mass of substances before a reaction must equal the total mass after the reaction. This principle, established by Antoine Lavoisier, ensures that matter is neither created nor destroyed. Thus, the correct answer is the Law of Conservation of Mass .
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