What are the parts of the dye molecules that affect the Rf of the spots as they move up the tlc plate? Please list several and explain why using Lewis structures. 3) The dyes in your clothing seldom comes off of the clothing onto your skin unless you have been sweating heavily. Why is that the case? 4) Please find three real world examples where chromatography is used routinely and provide citations.

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

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.

What are some natural measures of time