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_______________ cannot be gained or lost during a reaction, only transformed.

A. Air
B. Matter
C. Electricity
D. Reactants

2 Answers

1 vote
Matter cannot be gained or lost during a reaction, only transformed.

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This is the Law of Conservation of Mass, created by Antoine Lavoisier.
User Harish Reddy
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4 votes
matter is the definite answer for this one.
User Rasha Elsayed
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