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adelina 88 [10]
3 years ago
9

Which of the following is true about chemical reactions. A. they are accompanied by changes in energy. B. they form new substanc

es with new properties. C. both A & B
D.neither A nor B
Chemistry
1 answer:
Ilia_Sergeevich [38]3 years ago
7 0
The correct answer should be option C. hope this helps
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Answer:

To the best of my knowledge, it is because of the amount of gamma rays is given off.

Explanation:

While both are isotopes, Potassium 40 gives off fewer gamma rays compared to Cobalt 60. Potassium 40 isn't really harmful to humans, but Cobalt 60 (I believe) is used in chemotherapy.

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If you start with 30 moles of O2, how many moles of SiO2 can you make?
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Answer:

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Explanation:

Given parameters:

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