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21 June, 21:36

A sample of chlorine gas contracts from 550 mL to 376 mL when it is cooled from 63 °C to 12 °C. If the initial pressure of the chlorine was 725 torr, what is the final pressure of the chlorine?

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  1. 21 June, 21:50
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    We need to use the ideal gas formula. P1V1/T1 = P2V2/T2

    P1 = 725 torr

    V1 = 550 mL

    T1 = 63 C = 336 K

    P2 = ?

    V2 = 376 mL

    T2 = 12 C = 285 K

    (725 x 550) / (336) = (P2 x 376) / (285K)

    1190 = P2 x 1.32

    P2 = 900 torr
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