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11 votes
11 votes
Mass and energy are conserved Question 11 options: A) only in chemical changes. B) always in physical changes and sometimes in chemical changes. C) only in physical changes. D) in chemical changes and physical changes.

User Deep Kakkar
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1 Answer

20 votes
20 votes

Answer:

I think b always in physical changes and sometimes in chemical changes

User Vikram Palakurthi
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