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nikdorinn [45]
3 years ago
15

Hydrogen and oxygen react to form water. At an atomic level, how do we know that a chemical reaction has occurred

Chemistry
1 answer:
makkiz [27]3 years ago
3 0

Answer:  Bubbles are evidence that a chemical reaction took place because cause formation of a precipitate. Bubbles are evidence that a chemical reaction took place because they indicate the formation of gas as a new product.

Explanation:

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3 years ago
A reaction of 2.5kg of fissionable material takes place. Assuming a 0.10% mass defect, how much energy is released?
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Answer:

Energy released = 2.25\times 10^{14}\;J

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Now substitute the values in the above equation

E = 0.0025\times (3\times 10^{8})^2 = 2.25\times 10^{14}\;J

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Answer:

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