E. a student loaded their mixture of acetylferrocene and diacetylferrocene onto a column using 5 ml of dichloromethane as the loading solvent. they used about 7 g of sio2 as the stationary phase. the student then eluted the column using petroleum ether. after collecting 8 fractions, the student analyzed them by tlc to find that all of the compounds came off in the first two fractions, with no separation. where did the student go wrong, and what should they do differently when they try the column

odds are decent that your handwriting right now looks a little bit different than it did five years ago, and will look different again in five more. when i look back through my notebooks from middle school to now, i see a long, slow progression from meticulous and teeny letters to bigger, sloppier ones, plus a few side detours: sometime in high school, for example, i decided those loopy cursive lowercase f’s were just the coolest, adopting them as the lone rep for cursive in my otherwise all-print handwriting.

explanation:

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.

it is reliable if two scientists recorded it