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Two gases A and B have molecular weight ...

Two gases A and B have molecular weight 60 and 45. 0.6 g of A and 0.9 g of B are mixed in a closed vessel. Total pressure is 720 mm. The partial pressure of A is

A

240 mm

B

480 mm

C

600 mm

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Molecular weight of `A = 60`
Molecular weight of B = 45
Weight of A = 0.6 g
`thereore `Number moles of `A = (0.6)/(60) = 0.01`
Weight of B = 0.9 B
`therefore` Number of moles of `B = (0.9)/(45) = 0.02`
Total number of moles `= 0.01 + 0.02 = 0.03`
Total pressure = 720 mm
` therefore` Partial pressure of `A = (0.1)/(0.3) xx 720 = 240 mm`
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Knowledge Check

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