The atmosphere of mars is mostly (molar mass ) under a pressure of 650 pa, which we shall assume remains constant. in many places the temperature varies from 0°c in summer to ‐100°c in winter. over the course of a martian year, what are the ranges of (a) the rms speeds of the co2 molecules and (b) the density (in mol/m3 ) of the atmosphere?

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12000j is work done

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.