Using dimensional analysis check the correctness of the equation x=h/mv

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s. t.p.?

Can anyone plz answer any of these. even if its one it will

(asap) uneven heating of the earth's surface is due primarily to the position of the equator, north pole, sun, or moon?