density of a gas is found to be 5.46g/dm^3 at 27°C at 2 bar pressure. what will be its density at STP.
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For an ideal gas
ρ = Mp/ RT
From the given data,
5.46 = 2 x M/ 300 x R ………(1)
ALSO ρ at STP = 1 x M/ 273 x R ………..(2)
FROM (1) & (2)
ρ at STP = (1 x M/ 273 x R) x (300 x R/ 2×M)
= 300 / 273 X 2 = 3.00 g/dm^3
Hence, the density of the gas at STP will be 3 g dm^–3.
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