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A gaseous mixture is composed of 1.5 moles of He, 2.5 moles of N2 and an...

A gaseous mixture is composed of 1.5 moles of He, 2.5 moles of N2 and an unknown number of moles of He. The mixture is contained within a 20-liter vessel. If the partial pressure of the N2 ​​ is 10 atm, what is the temperature of the mixture in degrees Kelvin, ˚K? R= 0.0821 L x atm/mol x ˚K.

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