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If a chemical change requires energy, which of the following could be the source of the energy?

Aheating with a flame
Bsettling the mixture for 20 minutes
Cmeasuring mass from a balance beam
Dadding more substance to the observed material

Verified Answer :

meerkat18

The answer for the question given is A. Heating with a flame.

One of the processes that cause a chemical change is heating. An example of this is cooking or baking, which causes a permanent chemical change in substances. Also, all of the other choices are examples of physical changes.

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