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Georgia [21]
3 years ago
5

What element has an atomic mass 4?

Chemistry
2 answers:
Daniel [21]3 years ago
4 0

Answer:

Helium has atomic mass  4.002602.

So the answer to yr question is helium.

ollegr [7]3 years ago
4 0
The answer is helium
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A sample of an unknown gas with a mass of 8.21 g has a volume of 4.8064 L when the temperature is 200oC and the pressure is 1.81
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Answer:

The answer to your question is M = 36.49 g

Explanation:

Data

mass = 8.21 g

volume = 4.8064 L

Temperature = 200°C

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M = ?

Process

1.- Convert temperature to °K

°K = 273 + 200

°K = 473

2.- Calculate the number of moles

n = (PV)/RT

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n = 0.225

3.- Calculate the molar mass

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M = (1 x 8.21)/0.225

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