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Q.

A rigid container contains helium gas at 150 KPa and 127oC. If R=8.3 J−mol−1K−1, the density of the gas is

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a

1.2×10−2 kg/m3

b

0.8×10−1 kg/m3

c

0.18 kg/m3

d

0.06 kg/m3

answer is C.

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Detailed Solution

PV=nRT⇒P=(mV).RTM P=ρRTM⇒ρ=PMRT ∴ ρ=150×103×4×10−38.3×400kg/m3=0.18 kg/m3
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A rigid container contains helium gas at 150 KPa and 127oC. If R=8.3 J−mol−1K−1, the density of the gas is