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ANY HELP! 2!

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Saladin:
Hey guys post any doubts on the following topics:

Physics
Chemistry
Mathematics (c1 C2 S1 FP1)
Business
and Biology, with special host nid404
For Edexcel

I will do my best to help you guys out. Please post all your problems. Will be here for another 30 min.

Saladin:
Please post any questions that you may have on the previously stated subjects.

mousa:
Flask X contains 1 dm3 of helium at 2 kPa pressure and flask Y contains 2 dm3 of neon at 1 kPa
pressure.
If the flasks are connected at constant temperature, what is the final pressure?
\

Thanks in advance :)

slvri:
when the flasks are connected the total volume of them both is 1+2=3dm3
now using boyle's law
for flask X:p1v1=p2v2
1(2)=p2(3)
p2=0.67kPa
for flask Y:p1v1=p2v2
2(1)=p2(3)
p2=0.67kPa
total pressure=0.67+0.67=1.34kPa

Saladin:
Thanx a lot slvri, thats the correct answer.

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