Which statement describes the motion of the sun?
The sun rotates at the same rate throughout
The sun does not rotate at it poles
Different parts of the sun rotate at different rates
The sun does not rotate at its equator

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.