To prevent the presence of air, noble gases are placed over highly reactive chem

Question

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. A chemical engineer places a mixture of noble gases consisting of 4.63 g of He, 14.4 g of Ne, and 35.3 g of Kr in a piston-cylinder assembly at STP. Calculate the partial pressure of each gas. PHe = WebAssign will check your answer for the correct number of significant figures. atm PNe = WebAssign will check your answer for the correct number of significant figures. atm PKr = WebAssign will check your answer for the correct number of significant figures. atm

Explanation / Answer

MOles of He = 4.63/4 = 1.158 moles of Ne = 14.4/20.1 = 0.716 moles of Kr = 35.3 / 83.7 = 0.42 Partial pressure = Mole fraction * total pressure and given total pressure is 1atm partial pressure of He = 1.158/(1.158+0.716+0.42) = 0.504 atm partial pressure of Ne = 0.716/(1.158+0.716+0.42) = 0.312 atm partial pressure of He =0.42/(1.158+0.716+0.42) =0.183 atm

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