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a mixture of 0.220 moles co, 0.350 moles h2 and 0.640 moles he has a total pressure of 2.95 atm. what is the pressure of co? a) 1.86 atm b) 0.649 atm c) 0.536 atm d) 1.54 atm e) 0.955 atm

Respuesta :

The pressure of co is 0.536 atm. So, the correct option is (C)

Mole fraction of a gas = the Number of moles of gas / Total moles of gas

For CO :

Mole fraction of CO = 0.220/( 0.220 + 0.350 + 0.640)

  = 0.1818

the pressure of a gas = Mole fraction×Total pressure

For CO :

pressure of CO = 0.1818 ×2.95 atm ≈  0.536 atm

Hence, the pressure of co is  0.536 atm.

The ratio of the partial pressure of a given gas to the overall pressure exerted by the gaseous mixture is the mole fraction of that gas in a mixture of gases. When the entire number of moles in the mixture is known, this mole fraction can also be used to determine the total number of moles of a constituent gas.

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