Aliquid mixture containing containing 30% by mole benzene, 25% by mole toluene, and 45% by mole xylene is fed to a distillation column. the bottom product contains 98% by mole xylene and no benzene, and 96% of the xylene in the feed is recovered in this stream. the overhead product from the column is fed to a second distillation column. the overhead product from the second column contains 97% by mole benzene in the feed to this column. the composition of this stream is 94% by mole benzene and the rest toluene. (a) [17 points) draw and label a simple flowchart of this process, and do a degree of freedom analysis to prove that for an assumed basis of calculation, molar flow rates and compositions of all process streams can be calculated from the given information. write in order the equations you would solve to calculate unknown process variables. in each equation (or pair of simultaneous equations), circle the variable(s) for which you would solve. do not perform any calculations. (b) (4 points) calculate the percentage of benzene in the feed to the first distillation column that emerges in the overhead product from the second distillation column. (c) (4 points] calculate the percentage of toluene in the feed to the first distillation column that emerges in the bottom product from the second distillation column.

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. one potential application of nanotechnology is the construction of artificial cells. the simplest cells would probably mimic red blood cells, the body's oxygen transporters. for example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a person's bloodstream. if the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. suppose that the nanocontainers were cubic and had an edge length of 24 nanometers. part a part complete what is the volume of one nanocontainer? (ignore the thickness of the nanocontainer's wall.) express your answer using two significant figures. v v = 1.4ă—10â’20 l previous answers correct significant figures feedback: your answer 1.3824â‹…10â’20 = 1.382ă—10â’20 l was either rounded differently or used a different number of significant figures than required for this part. if you need this result for any later calculation in this item, keep all the digits and round as the final step before submitting your answer. part b suppose that each nanocontainer could contain pure oxygen pressurized to a density of 81 g/l . how many grams of oxygen could be contained by each nanocontainer?