TUOR. Idld
8 Chemistry End of Unit Test ACA 2020-2021 / 13 of 25
Il Pause
The diagram s...
Chemistry, 20.10.2020 05:01 naterasjen6531
TUOR. Idld
8 Chemistry End of Unit Test ACA 2020-2021 / 13 of 25
Il Pause
The diagram shows a model of an atom. The model has four different symbols on it. Each symbol represents
different role for one of the particles within the atom.
Model Atom
In this model, which particle determines the reactivity of this atom?
O
A W
O
B. X
O
C. Y
a
D. Z
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 06:00, lindseyklewis1p56uvi
Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %
Answers: 1
Mathematics, 07.04.2020 19:01
Mathematics, 07.04.2020 19:01