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equal weights of ethane and hydrogen are mixed in an empty vessel at 25 degree celsius . the fraction of the total pressure exerted by hydrogen is- 1/2 1/1 1/16 15/16

equal weights of ethane and hydrogen are mixed in an empty vessel at 25 degree celsius . the fraction of the total pressure exerted by hydrogen is- 
  1. 1/2
  2. 1/1
  3. 1/16
  4. 15/16

Grade:12th pass

1 Answers

Beenu Mathew
533 Points
7 years ago
Ans is (4)
 
Look go step by step that is the key.
in these kind of questions you have to take mole fraction.
let equal weights of both ethane and hydrogen be W.
so, molefraction of H2 has to be calculated...
W/2/W/2 + W/30 (mole fraction of H2....nummber of moles of H2/number of moles of H2 + number of moles of ethane.)
(now you might be wondering what is 30...it is the molecular mass of ethane...)
On solving you will get 30/32 or 15/16
HOPE THIS HELPS 
PLS APPROVE
THANK YOU
JEHOYESJIRA
 
 
 

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