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Shane Macguire Grade: upto college level
        Equal weights of methane and oxygen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by oxygen is 

a. 1/3
b. 1/2
c. 2/3
d. 1/3 × 273/298
3 years ago

Answers : (1)

Aditi Chauhan
askIITians Faculty
396 Points
										Sol.  If x g of both oxygen and methane are mixed then :

Mole of oxygen = x/32
Mole of methane = x/16
⇒ mole fraction of oxygen = (x/32)/(x/32 + x/16) = 1/3
According to law of partial pressure
Partial pressure of oxygen (po2) = mole-fraction × total pressure
⇒ 〖Po〗_2/p = 1/3
3 years ago
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