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Yuliya22 [10]
3 years ago
12

Which of these describes an endothermic reaction?

Chemistry
1 answer:
Rus_ich [418]3 years ago
5 0

Energy is absorbed bc endo means in so endothermic means energy is absorbed

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Write balanced reactions for the complete combustion of hydrogen. Express your answer as a chemical equation. Identify all of th
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Answer:

Explanation:

A combustion  involves the reaction of a fuel with oxygen (O₂). During the reaction of combustion of hydrogen (H₂), H₂ reacts with O₂ to form water (H₂O). The <em>balanced chemical equation</em> is the following:

2 H₂(g) + O₂(g) → 2 H₂O(g)

According to the chemical equation, 2 moles of H₂O are obtained from the reaction of 2 moles of H₂ with 1 mol of O₂. All reactants and products are in the gaseous phase.

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Which of the following are considered pure substances?
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What do calcium chloride, sodium carbonate, calcium carbonate, and potassium carbonate all have in common? (other than they reac
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What is the temperature difference if 300 cal are used to warm water
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Answer:

<u>The temperature difference is</u> \frac{300}{m} Kkg^{-1}

Explanation:

The formula that is to used is :

ΔQ=msΔT

<em>where ,</em>

  • <em>ΔQ is the heat supplied in calories = 300cal</em>
  • <em>m is the mass of water taken = m (assumed)</em>
  • <em>ΔT is the change in temperature</em>
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ΔT :

\frac{300}{m*1} \\=\frac{300}{m} Kkg^{-1}

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Can someone find from which website this test is?
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Try quizlet, they have everything on there

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