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5 October, 12:57

2.50 L of a gas was at an unknown pressure. However, at standard pressure, its volume was measured to be 8.00L. Whats was the unknown pressure?

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  1. 5 October, 15:53
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    Answer: 2432 mmHg

    Explanation:

    Given that,

    Original volume of gas V1 = 2.50L

    Original pressure of gas P1 = ? (P1 is the unknown pressure)

    New volume of gas V2 = 8.0L

    New pressure of gas P2 = 760 mmHg

    (Note that standard pressure a gas is 760 mmHg)

    Since pressure and volume are given while temperature is constant, apply the formula for Boyle's law

    P1V1 = P2V2

    P1 x 2.50L = 760 mmHg x 8.00L

    P1 x 2.50L = 6080 mmHg L

    P1 = 6080 mmHg L / 2.50L

    P1 = 2432 mmHg

    Thus, the unknown pressure P1 is 2432 mmHg
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