Benzene is a non-polar molecule, meaning that it does not have a positive or negative side. Which statement BEST describes how benzene will dissolve in water? A) Benzene can only exist as a gas and gases will not dissolve in water. B) Benzene dissolves well in water since polar molecules dissolve well in polar solvents. C) Benzene will dissolve in water because water is a universal solvent; it will dissolve anything. D) Benzene will not dissolve well in water since non-polar molecules do not dissolve in polar solvents.

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

What effect does a decrease in temperature have on the overall rate of a chemical reaction? a decrease in temperature decreases . the reaction rate will