A mixture of CH4, N2 and O2 is enclosed in a vessel of one litre capacity at O° C.The ratio of partial pressures of gases is I : 4 :2. Total pressure of the gaseous mixture is 2660 mm. The number of molecules of oxygen present in the vessel is

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6.02×102322.4

6.02×1023

22.4×1022

1000

answer is A.

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Detailed Solution

Partial pressure of oxygen =21+4+2×2660=760 mm Thus, 1 L oxygen gas is present at 0°C and760 mm pressure ∴ Number of oxygen molecules =6.023×102322.4

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