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NEET 2016 (Phase 2) · Gas Laws & Ideal Gas Equation

Gas Laws & Ideal Gas Equation question from NEET 2016 (Phase 2)

Q72NEET 2016 · PHASE 2Easy

Gas Laws & Ideal Gas Equation

A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. Which of the following gives the density of the gas?

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Answer: (b)

$P = nk_BT$ , where $n$ = number of molecules per unit volume, so $n = \dfrac{P}{kT}$ .
Density $\rho = nm = \dfrac{Pm}{kT}$
So the answer is (b) $\dfrac{Pm}{kT}$ .

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