# Three gases O2, N2 and Co2 having masses 16g, 28g and 44g respectively are filled in a container of volume V

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Three gases O2, N2 and Co2 having masses 16g, 28g and 44g respectively are filled in a container of volume V. Evaluate total pressure if temperature of the gases is T.

1. $${3\over2}{ RT\over V}$$
2. $${ RT\over V}$$
3. $${2\over5}{ RT\over V}$$
4. $${5\over2}{ RT\over V}$$

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The correct option is 4) $${5\over 2}{ RT\over V}$$

$$PV=({16\over32}+{ 28\over28}+{ 44\over44})RT$$

$$p={5\over 2}{ RT\over V}$$