Jessica is doing her pre-lab homework for Chemistry. She is asked to predict how many grams of oxygen gas are produced if 40.0 g of potassium chlorate is decomposed according to this balanced chemical equation shown.
2KCIO3(s) - 2KCI(s)+302(g)
She performs the following calculation, and gets 15.7 g of O, as her answer.
EKCIO, ,
mol KCIO,
molo
80
1 mol Kclo 3 mol O2
32.00 g 02
122.55 g KCIO, 2 mol KCIO, 1 mol O2
The next day when her group performs the experiment they obtain an actual yield of 15.1 grams of oxygen gas. What is the percent yield for the experiment?
report your answer to the tenths place, i. e.one decimal place.

Motivation cannot be developed with practice; a person either possesses it or they do not.

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 happens to isotopes that are unstable?