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Chemistry (Gas Law)

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A fire extinguisher filled with carbon dioxide has a mass of 3500g. After releasing all of the
CO2, the mass of the extinguisher is 2735g. What was the pressure reading on the gauge
before any CO2 was released, if the volume of the extinguisher is 4.25 L and it is stored
at a temperature of 25 oC?

  • Chemistry (Gas Law) -

    3500 g = mass gas + container
    -2735 g = mass container
    -----------
    765 g = mass CO2 gas

    mols CO2 = grams/molar mass = n
    Then use PV = nRT to dtermne P

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