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Svet_ta [14]
3 years ago
10

Which is an example of an endothermic reaction?

Chemistry
2 answers:
sertanlavr [38]3 years ago
5 0

The correct answer is C. Photosynthesis.

Explanation

Endothermic reactions are a chemical and physical term used to refer to the process of transformation of two or more substances into different ones, and that particularly consume energy, that is, that the resulting elements have higher energy levels than the initial elements, due to that have taken part of the heat of the environment. According to the above, photosynthesis is an endothermic reaction since plants absorb solar energy, to perform various processes that allow them to make their food, grow and generally live. So, the correct answer is C. Photosynthesis.

Solnce55 [7]3 years ago
4 0
Nuclear explosion i hope that correct
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Acetylene gas (c2h2) reacts with oxygen gas (o2) to produce carbon dioxide (co2) and water vapor (h2o). how many liters of c2h2
MissTica
According to the balanced equation of the reaction:

2C2H2 + 5O2 → 4CO2 + 2H2O

So we can mention all as liters,

A) as we see that 2 liters of C2H2 react with 5 liters of oxygen to produce 4 liters of CO4 and 2 liters of H2O 

So, when we have 75L of CO2

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∴ The volume of C2H2 required is:

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B) and, when we have 75 L of CO2


and 4CO2 → 2H2O 

∴ the volume of H2O required is: 
                               
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C) and from the balanced equation and by  the same way:

when 5 liters O2  reacts to give 4 liters of CO2

and we have 75 L of CO2:

5 O2 → 4 CO2 

   ??  ←  75 L

∴ the volume of O2 required is:

                              = 75 *(5/4)

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D) about the using of the number of moles the answer is: 

no, there is no need to find the number of moles as we called everything in the balanced equation by liters and use it as a liter unit to get the volume, without the need to get the number of moles.
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