Question

A mixture of gases containing 14g Nitrogen,
32g oxygen and 24 g of methane, the partial
pressure of oxygen gas is
(a) 1/2 P total (b)1/3 P total
(c)3/5 P total (d)2/3 P total
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Answer 1

Answer:

(b)

Explanation:

PO2=Molefraction * Ptotal

No.of moles of:

Nitrogen=14/28=0.5

Oxygen=32/32=1

Methane=24/16=1.5

Therefore,

mole fraction of O2=1/(1+0.5+1.5)=1/3

Hence 1/3 times Ptotal