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mafiozo [28]
3 years ago
13

Which reaction is an example of an endothermic reaction?

Chemistry
1 answer:
schepotkina [342]3 years ago
7 0

 d) A + B + heat C + D
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. In which reaction is nitric acid acting as an oxidising agent?
Talja [164]

Answer:

B. Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2

Explanation:

Hello,

In this case, we should understand oxidizing agents as those substances able to increase the oxidation state of another substance, therefore, in B. reaction we notice that copper oxidation state at the beginning is zero (no bonds are formed) and once it reacts with nitric acid, its oxidation states raises to +2 in copper (II) nitrate, thus, in B. Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2 nitritc acid is acting as the oxidizing agent.

Moreover, in the other reactions, copper (A.), sodium (C. and D.) remain with the same initial oxidation state, +2 and +1 respectively.

Regards.

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2 years ago
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WILL MARK BRAINLIEST
den301095 [7]
The answer is C. Life
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Please help !!!!!!!!
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How many grams of silver will be produced if 86g of copper are used
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