chm

A cylinder with a movable piston contains 2.00 of helium,He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2.00 L to 3.10 l ?

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asked by sarah
  1. Typo in the first line, I suppose you mean 2 grams of Helium
    P1 V1 = n1 R T1
    P1 V2 = n2 R T1
    so
    V1/V2 = n1/n2
    2/3.1 = 2/x
    x = 3.1
    x-2 = amount added = 1.1

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    posted by Damon
  2. yes thank you!!!!

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    posted by sarah
  3. That answer is not right.

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    posted by Corey

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