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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
5 years ago

Answers : (2)

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

						
5 years ago
Shivani singh
15 Points
							
  1. Suppose the mass of methane as well as oxygen =w=1
  2. (Xo2) = w/32/w/32+w/16 = 1/32/3/32 = 1/3 
  3. Let the total pressure = p 
  4. Pressure exerted by oxygen =  Xo× Ptotal =
  5. P× 1/3
 
one year ago
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