Answer:
C) Is the right answer
Explanation:
chemical reactions occur when a substance is changed into a whole 'nother substance, and cannot be changed back.
how do I know this?
I just learned it today... UwU
I hope this helps!!
The answers A. C. D. are all physical reactions
The answer is B. Digestion of food
When food is digested it is chemically broken down
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It allows the scientist to determine the age of the rock it is in
They have the same mass as the mass of the reactants. evidence to back this up is the law of conservation of mass
