Chemistry, 10.03.2021 14:00 dedgefield
an empty relative density bottle weights 20g. the bottle weights 40g when filled with petrol and 60g when filled with water. determine the density of the petrol.( density of water=1000kg/m³)
Answers: 2
Chemistry, 22.06.2019 04:00
Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?
Answers: 2
Chemistry, 22.06.2019 05:40
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 06:30
Design techniques and materials that reduce the negative environmental impact of a structure are referred to as
Answers: 2
Chemistry, 22.06.2019 19:40
Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory
Answers: 3
an empty relative density bottle weights 20g. the bottle weights 40g when filled with petrol and 60g...
Mathematics, 25.02.2020 00:07
Law, 25.02.2020 00:07
Physics, 25.02.2020 00:07
Mathematics, 25.02.2020 00:07
Computers and Technology, 25.02.2020 00:07
Chemistry, 25.02.2020 00:07
Mathematics, 25.02.2020 00:07
Mathematics, 25.02.2020 00:07
History, 25.02.2020 00:07
Mathematics, 25.02.2020 00:07
Computers and Technology, 25.02.2020 00:07
English, 25.02.2020 00:07