If $P_1$ is the partial pressure of a gas and $x_1$ is its mole fraction in a mixture,then the correct relation between $P_1$ and $x_1$ is:

  • A
    $P_{total} = P_1 x_1$
  • B
    $x_1 = \frac{P_1}{P_{total}}$
  • C
    $P_{total} = 1 - P_1 x_1$
  • D
    $P_{total} = P_1(1 - x_1)$

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