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According to the law of conservation of mass, which of these is true?

A. When a physical change occurs, some of the mass is destroyed.
B. When a chemical change occurs, some of the mass is destroyed.
C. When both a physical and chemical change occurs, mass is added.
D. When either a physical or chemical change occurs, no mass is destroyed.
( sorry don't know what subject for this since there isn't science!!)

User Mukyuu
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they answer is D my Friend
User Jdhurst
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