Pls pls help with this one pls
...
Answers: 2
Chemistry, 21.06.2019 15:20, zymikaa00
Both 1,2âdihydronaphthalene and 1,4âdihydronaphthalene may be selectively hydrogenated to 1,2,3,4âtetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.
Answers: 2
Chemistry, 22.06.2019 05:40, Maryjasmine8001
Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml
Answers: 2
Chemistry, 22.06.2019 08:30, breannaking9734
Which part of earthâs surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains
Answers: 2
Mathematics, 12.11.2020 22:50
Chemistry, 12.11.2020 22:50
Mathematics, 12.11.2020 22:50
Mathematics, 12.11.2020 22:50
Health, 12.11.2020 22:50