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9 December, 01:51

A sample of gas has a volume of 215 cm3 at 23.5 °c and 84.6 kpa. what volume (cm3 will the gas occupy at stp

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  1. 9 December, 05:22
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    The answer is 165.3 cm³.

    P1 * V1 / T1 = P2 * V2 / T2

    The initial sample:

    P1 = 84.6 kPa

    V1 = 215 cm³

    T1 = 23.5°C = 23.5 + 273 K = 296.5 K

    At STP:

    P2 = 101.3 kPa

    V2 = ?

    T2 = 273 K

    Therefore:

    84.6 * 215 / 296.5 = 101.3 * V2 / 273

    61.34 = 101.3 * V2 / 273

    V2 = 61.34 * 273 / 101.3

    V2 = 165.3 cm³
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