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  If the volume of a gas, at constant temperature, changes from 200 ml to 500 ml, the pressure on the gas must have changed from 400 torr to?

chemistry ?

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  • Dr W
    Lv 7
    6 days ago

    P1V1 = P2V2

    P2 = P1 * (V1 / V2)

    P2 = 400torr * (200mL / 500mL) = 160 torr

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  • 6 days ago

    3. a) The volume increased, so the pressure must decrease.

    b)

    (400 torr) x (200 mL / 500 mL) = 160 torr

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  • The secret to passing whatever unit you're on in chemistry:

    Memorize the following laws:

    - Charles'

    - Boyle

    - Gay-Lussac

    It's pretty much brainlessly inserting numbers into the calculator, you can do it

  • They gave you the formula and 3 of the variables

    P[1] = 400 torr

    V[1] = 200 ml

    V[2] = 500 ml

    P[2] = x torr

    400 * 200 = 500 * x

    Solve for x

    400 * 200 / 500 = x

    4 * 200 / 5 = x

    4 * 40 = x

    160 = x

    P[2] = 160 torr

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