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A Mixture of \mathrm{N_{2}} and \mathrm{Ar} gas in a cyclinder contains \mathrm{5g\, N_{2}} and \mathrm{8g\, at\, Ar}.
If the total pressure of the mixture of gases in the cyctinder is 30 bar,
the partial Pressure at \mathrm{N_{2}} is \mathrm{\Rightarrow } [use atomic mass \mathrm{N= 14\: Ar= 40 }]

Option: 1

156 ar


Option: 2

13.56 ar


Option: 3

13.56 ar


Option: 4

None of the above


Answers (1)

best_answer

\mathrm{\text { Mass of } N_{2} =5 \mathrm{~g}}
\mathrm{\text { Moles of } N_{2} =\frac{5}{28} }
\mathrm{\text { Mass of } A r =8 \mathrm{~g} \text { Mole of } A_{2}=\frac{8}{40} }

\mathrm{(Partial\: pressure) \: N_{2}=P_{T} \times( Mole\: fraction ) N_{2} }
\mathrm{=30 \times \frac{5 / 28}{\frac{5}{28}+\frac{8}{40}}}
\mathrm{ =30 \times \frac{-17}{-37} }
\mathrm{ =30 \times 45 }
\mathrm{ =13.5 \text { ar }}

Posted by

seema garhwal

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