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Doss [256]
3 years ago
14

How do we exist? What does scientific evidence suggest about the start of the universe?

Chemistry
1 answer:
kotykmax [81]3 years ago
4 0

Answer:

It all started with the big bang.

The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now (and it could still be stretching).

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x² = mutiphy by them self

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26. All atoms area. positively charged, with the number of protons exceeding the number of electronsb, negatively charged, with
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3 years ago
Acetylene gas (c2h2) reacts with oxygen gas (o2) to produce carbon dioxide (co2) and water vapor (h2o). how many liters of c2h2
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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

and when we have 2 L of C2H2 reacts and gives 4 L of CO2

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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

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   ??  ←  75 L

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                              = 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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