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Imagine a planet whose diameter and mass...

Imagine a planet whose diameter and mass are both one half of those of earth. The day's temperature of this planet surface reaches upto `800 K`. ? Make calculation and tell whether oxygen molecules are possible in the atmosohere of the planet.
[Escape velocity from earth's surface `= 11.2 km//s, k = 1.38 xx 10^(-23)J//K`, mass of oxygen molecule `= 5.3 xx 10^(-26) kg`].

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