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The stop cock connecting two bulbs of vo...

The stop cock connecting two bulbs of volume 5 litre and 10 litre containing an ideal gas at 9 atm and 6 atm respectively, is opened. What is the final pressure in the two bulbs

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`P_(1) V_(1) + P_(2) V_(2) = P_(R) (V_(1) + V_(2))`
`9 xx 5 + 6 xx 10 = P_(R) (15)`
`P_(R) = 7 atm`
where, `P_(R) =` resultant pressure after mixing.
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