$\overline{){\mathbf{PV}}{\mathbf{=}}{\mathbf{nRT}}}$

P = pressure, atm

V = volume, L

n = moles, mol

R = gas constant = 0.08206 (L·atm)/(mol·K)

T = temperature, K

A mixture containing 0.768 mol He(g), 0.286 mol Ne(g), and 0.116 mol Ar(g) is confined in a 10.00-L vessel at 25 ^{o}C.

Calculate the partial pressure of He in the mixture.

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