Just checking answer for effusion

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hi guys ,

i did this chemistry question and me and my friends got very different answers.. so i want to know wats the right answer...

a professor fills a balloon with equal molar amounts of hydrogen and oxygen . the demo for that day gets postponed to the next day and over the night 45% of the hydrogen escapes. what is the ratio of oxygen to hydrogen now? i got 6:5 as my ans ...
 

Gokul43201

Staff Emeritus
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nithin, we can't help you unless you first tell us how you tried to solve the problem (not just the final number).
 
i got a ratio of 11:17.75..lol
 

Gokul43201

Staff Emeritus
Science Advisor
Gold Member
6,907
13
Perhaps I wasn't clear before. Show us clearly, the steps you used in arriving at the answer. Only then can we find tell you where you've made a mistake.

6:5 is not the same as 11:17.75, and neither of those is close to the number I get. Besides, your answers are equivalent to having the rate of effusion of oxygen be very similar or much greater than the rate of effusion of hydrogen. Does either of that sound physically plausible to you?
 
sry........i got 8:5
 

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