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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
States of Matter

NTA Abhyas 2020 · Chemistry · States of Matter

60 g of gaseous C _ 2 H _ 6 are mixed with 28 g of carbon monoxide....

60 g of gaseous C2H6{C}_{2}{H}_{6} are mixed with 28 g of carbon monoxide. The pressure of the resulting gaseous mixture is 3 atm. The partial pressure in atm. of C2H6{C}_{2}{H}_{6} in the mixture is

Correct answer

2.00

Step-by-step solution

Moles of C2H6=60g32g/mol=2mol{C}_{2}{H}_{6} = \dfrac{60\text{g}}{32g / mol} = 2mol
moles of CO=28g28g/mol=1molCO = \dfrac{28\text{g}}{28\text{g/mol}} = 1\text{mol}
Mole fraction C2H6=22+1=23{C}_{2}{H}_{6} = \dfrac{2}{2 + 1} = \dfrac{2}{3}
Partial pressure of C2H6=Ptotal×{C}_{2}{H}_{6} = {P}_{total} \times Mole fraction of C2H6{C}_{2}{H}_{6}
=3atm×23=2atm= 3\text{atm} \times \dfrac{2}{3} = 2\text{atm} .
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