5. The extinction coefficient determined above was for the mixture of Kool-Aid, which contains red dye 40, preservatives and flavoring agents. The actual extinction coefficient for Red 40, which causes most of the absorption, is 2.7 x 104 Lmol-1cm-1 around 500nm. Determine the concentration of red dye in the stock solution. This calculation requires you to determine the concentration of test tube 1 (the working solution) and then use the dilution factor to convert this concentration to that of the stock solution.

Will give imagine you are given a mystery element. it is, however, a discovered and known element. you may perform a maximum of two observations or tests to determine its identity. time and money is critical, so you need to prioritize your tests. if you can get by with a single test, you get 100 super-geek points from your research lab team. pick your two tests, number them as #1 and #2, and justify why you think these two will certainly be enough (and why the first might well be enough all by itself.) the available tests are classification into metal, non-metal, or metalloid, count of valence electrons, count of electron shells, atomic radius (error range: +/- 1 pm), electronegativity (error range: +/- 0.1), first ionization energy (error range: +/- 10 kj/mole), melting point (error range: +/- 10 c), and boiling point (error range: +/- 20 c).