4 years ago

Which is the most important question for deciding if a chemical reaction has occurred

2 answers:

6 0

A chemical reaction undergoes a chemical change so the question you should ask if a chemical reaction has occurred is "Did a chemical change happened?". Chemical change in a reaction happens when you see bubbles, when the reaction increases or decreases in temperature or a precipitate is formed.

anastassius [24]4 years ago

4 0

Answer:

the answer is Was there any heat energy given off?

Explanation:

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