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Atul Kari
Asked: 2022-11-04T18:56:20+05:30 In:

At 298 k, which of the following gases has the lowest average molecular speed?
A. `CO_(2)” at”” 0.20″ ” atm”`
B. `He ” at ” 0.40 ” atm”`
C. `CH_(4) ” at” ” 0.80″” atm”`
D. `NO” at”” 1.00″” atm”`

At 298 k, which of the following gases has the lowest average molecular speed?
A. `CO_(2)” at”” 0.20″ ” atm”`
B. `He ” at ” 0.40 ” atm”`
C. `CH_(4) ” at” ” 0.80″” atm”`
D. `NO” at”” 1.00″” atm”`
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1 Answer

  1. Correct Answer – A
    `u_(av)=sqrt((8pV)/(piM)`
    `u_(av)propsqrt(p/(M))=sqrt(0.20/44)=0.067″ for ” CO_(2)`
    `=sqrt(0.40)/(4)=0.32` for He
    `=sqrt((0.80)/(16))=0.22″ for ” CH_(4)`
    `=sqrt((1)/(30))=0.18″ for “NO`

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