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Mass measurement for gases

  1. Jan 21, 2005 #1
    During mass measurement for a gas, why must you measure the gas, release some, and measure it again?
     
  2. jcsd
  3. Jan 21, 2005 #2

    Gokul43201

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    You have to provide more context. How are you doing the measurement ?
     
  4. Jan 22, 2005 #3
    The gas is collected in a glass tube over water.
     
  5. Jan 22, 2005 #4
    I think (but do not hold me to it) that it is so you can create a linear scale for the voume related to the mass.

    Most likely this is wrong though.

    The Bob (2004 ©)
     
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