In a certain region of space there are only 5 molecules per cm3 on an average. The temperature is 3K. What is the average pressure of this very dilute gas?
A
2.07×10−16Pa
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B
1.07×10−16Pa
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C
3.07×10−16Pa
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D
4.07×10−16Pa
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Solution
The correct option is D2.07×10−16Pa ET=N32kTET=5×32×1.38×10−23×3PV=23NEP×10−6=23×5×32×1.38×10−23×3P=2.07×10−16Pa