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Three gases O2, N2 and Co2 having masses 16g, 28g and 44g respectively are filled in a container of volume V. Evaluate total pressure if temperature of the gases is T. 

  1. \({3\over2}{ RT\over V}\)
  2. \({ RT\over V}\)
  3. \({2\over5}{ RT\over V}\)
  4. \({5\over2}{ RT\over V}\)
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The correct option is 4) \({5\over 2}{ RT\over V}\) 

\(PV=({16\over32}+{ 28\over28}+{ 44\over44})RT\) 

\(p={5\over 2}{ RT\over V}\)

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