At 0∘C the density of certain oxide of a gas at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide?
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Solution
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The expression for density is ρ=MPRT. When the temperature is constant, M′=MPP′. Here, M and P are the molar mass and pressures of nitrogen and M' and P' are the molar mass and pressures of oxide. Substitute values in the above equation. M′=28×52=70u
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