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8 July, 03:34

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

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  1. 8 July, 03:59
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    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.
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