Q.

Calculate density of a gaseous mixture which consist of 3.01x 1024 molecules of N2 and 32 g of O2 gas at 3 atm pressure and 860 K temperature (Given : R = 1/12 atm L/mole.K)

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a

0.6 g/L

b

1.2 g/L

c

0.3 g/L

d

72 g/L

answer is B.

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Detailed Solution

Moles of N2 =3.01×10246.02×1023=5Moles of O2  =3232=1molAverage molar mass =5×28+32×15+1=1726=28.67dmix =PMavg. RT=3×28.67112×860=1.2g/L
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Calculate density of a gaseous mixture which consist of 3.01x 1024 molecules of N2 and 32 g of O2 gas at 3 atm pressure and 860 K temperature (Given : R = 1/12 atm L/mole.K)