Which of the following gases has a density of 0.715g/L at STP
a) He
b) CO2
c) CO
d) CH4

CO2 is the gas which has high density of 0.715/L at STP.

Explanation:

PV=nRT

at STP,

P,T=constant

V=Km/M

1/K=m/V*1/M=S*1/M

therefore,

The molar mass is more, as well as the density is also greater

Hence Only CO2 has greater mass and greater density.

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state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne