Hydrogen peroxide is an extremely unstable liquid. consequently, it is only commercially available as an aqueous solution. for this experiment we will use reagent grade h2o2 which is a 30.0% (w/w) solution the unit (w/w) denotes a weight/weight percentage (solute/solution) 30.0% (w/w) solution 30.0 g h2o2 per 100 g solution density of 30.0% h2o2 solution 1.11 g/ml i. what is the concentration (in m) of 30.0% (w/w) h2o2? i. how many milliliters (ml) of 30.0% (w/w) h2o2 solution are needed to prepare 50.0 ml of3.60 m h202 solution?

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

What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?

What physical property of gold makes panning a useful way to get gold from streams?