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Which sample equation best illustrates the law of conservation of mass?
A. 4 grams reactant U+3 grams reactant V to 7 grams product W
B. 12 grams reactant X+10 grams reactant Y to 2 grams product Z
C. 5 grams reactant E+5 grams reactant F to 20 grams product G+5 grams product H
D. 10 grams reactant Q+9 grams reactant R to 90 grams product S+90 grams product T

Answer :

Answer:

A

Explanation:

4 grams reactant U+3 grams reactant V to 7 grams product W

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