Question:medium

At $27^\circ C$, a real gas of molar mass \[ 44\ \text{g mol}^{-1} \] occupies a volume of \[ 0.4\ \text{L} \] at a pressure of \[ 40\ \text{atm}. \] If the compressibility factor is \[ Z=0.65, \] what is its weight (in g)? \[ (R=0.082\ \text{L-atm K}^{-1}\text{mol}^{-1}) \]

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For real gases: \[ PV=ZnRT. \] If $Z\lt 1$, intermolecular attractions dominate. Always calculate moles using \[ n=\frac{PV}{ZRT} \] before finding the mass.

Updated On: Jul 29, 2026

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The Correct Option is B

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At \(27^\circ C\), a real gas of molar mass \[ 44\ \text{g mol}^{-1} \] occupies a volume of \[ 0.4\ \text{L} \] at a pressure of \[ 40\ \text{atm}. \] If the compressibility factor is \[ Z=0.65, \] what is its weight (in g)? \[ (R=0.082\ \text{L-atm K}^{-1}\text{mol}^{-1}) \]

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The Correct Option is B

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