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gas laws..

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astarmathsandphysics:
one more please
A balloon filled with helium rises to a certain height at which it gets fully inflated to a volume of 100000 litres. If at this altittude the pressure is 0.02 atm and temp is 268K, what weight of helium is required to fully inflate the balloon

when i used PV=nRT i don't get the right answer

Ans-36.36g

n=pV/RT=(0.02*10^5*100)/(8.31*268)=89.8 mols
i mole of helium weighs 4g so 89.8 mols weighs 4*89.8=359.2g

Ghost Of Highbury:
answer - 36
astar's answer = 359.2 ]

??

misprint?

astarmathsandphysics:
I checked it too. I still get the same. what did you get?

Ghost Of Highbury:
lol..i cannot solve an A/AS level physics question.  Only maths questions (most of them)

the answer says - 36g

astarmathsandphysics:
thin k there may be a factor of 10 too much somewhere.

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