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    This equation was derived from the combined law and Avogadro's law, so if one combines these two, we get:

    pv/T = C (C is a constant which is directly proportional
    to the nr of moles of gas)

    And the proportionality factor so happened to be
    R, a constant (8.314472 J·K−1·mol−1)
    So if we say C=nR, and rearrange the equation, we get

    pV= nRT , our equation.

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