We’re being asked to **calculate the partial pressure of Ar **in a **mixture of N _{2}, Ne, and Ar**.

Recall that the ** partial pressure of a gas (P_{Gas})** in a mixture is given by:

$\overline{){{\mathbf{P}}}_{\mathbf{gas}\mathbf{}}{\mathbf{=}}{\mathbf{}}{{\mathbf{\chi}}}_{{\mathbf{gas}}}{{\mathbf{P}}}_{{\mathbf{total}}}}$

A gas sample contains 3.50 moles of argon, 2.08 moles of neon and 1.22 moles of nitrogen. If the total pressure of the sample is 3.66 atm, what is the partial pressure of argon?

(A) 3.66 atm

(B) 22.4 atm

(C) 0.179 atm

(D) 1.12 atm

(E) 1.88 atm

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