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vladimir2022 [97]
4 years ago
11

What must happen before a chemical reaction can begin?

Biology
1 answer:
shepuryov [24]4 years ago
8 0
The answer is B. A chemical reaction consists of an endothermic stage (energy taken in to break chemical bonds) followed by an exothermic stage (energy released as bonds are formed). The first stage requires this energy input, which is the activation energy. When the activation energy is reached or exceeded, the reaction will occur. Therefore as soon as this threshold is REACHED, it happens
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