Based on formal charge arguments, which of the following I) N O b b N b b b b b b II) b N N b O b b b b b b is the better Lewis dot structure? 1. Structure II is the better Lewis structure. correct 2. Structure I is the better Lewis structure. 3. Neither is a good Lewis structure. 4. Both are equally good Lewis structures.

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

How are isotopes of the same chemical element alike? how are they different?

How many grams of mgbr2 are needed to produce 75g or metal?