Which describes the polarity in a water molecule?
a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
b). partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms
c). partial positive charge on the oxygen atom because it pulls electrons from the hydrogen atoms
d). partial positive charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

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

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion