First slide

Gaseous state

Question

1 mole of O₂ and x mole of Ne in a 10 L flask constant temperature exert a pressure of 10 atm. If partial pressure of O₂ is 2 atm, moles of Ne in the mixture is

Moderate

A

1
B

2
C

3
D

4

Solution

$χ_{o_{2}} = (\frac{1}{1 + x}), p_{O_{2}} = (\frac{10}{1 + x}) = 2 ∴ x = 4 mol Ne$

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