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lakkis [162]
3 years ago
7

Which element has 5 valence electrons on ring 4? ____________ Is it a metal, nonmetal or metalloid?_____________________

Chemistry
1 answer:
valina [46]3 years ago
7 0

Answer:

-Nitrogen has 5 valence electrons on the 4th shell

-nitrogen is a non metal

-

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Determine the average atomic mass of the following mixture of isotopes of Potassium:
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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
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According to the balanced equation of the reaction:

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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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                    = 37.5 L

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C) and from the balanced equation and by  the same way:

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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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