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HACTEHA [7]
2 years ago
13

Which of the following is a source of chemical energy commonly used by humans? A. water flowing in a river B. a bicycle C. a san

dwich D. turning on a lightswitch
Chemistry
1 answer:
ziro4ka [17]2 years ago
7 0

Answer:

Option C sandwich is the correct option

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What is the relationship between concentration and rate of reaction?
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<h3><u>Answer;</u></h3>

Directly proportional

<h3><u>Explanation;</u></h3>
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3 years ago
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mr Goodwill [35]
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