Chemistry, 28.11.2019 22:31 zanaplen27
The determination in problem 15-9 was modified to use the standard-addition method. in this case, a 3.925-g tablet was dissolved in sufficient 0.10 m hcl to give 1.000 l. dilution of a 20.00-ml aliquot to 100 ml yielded a solution that gave a reading of 415 at 347.5 nm. a second 20.00-ml aliquot was mixed with 10.0 ml of 50-ppm quinine solution before dilution to 100 ml. the fluorescence intensity of this solution was 503. calculate the percentage of quinine in the tablet.
Answers: 2
Chemistry, 21.06.2019 13:50
The electron configuration for chromium is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 5 4 s 1 instead of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 4 4 s 1 . the configuration is an exception to the
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Chemistry, 22.06.2019 01:30
Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -
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Chemistry, 22.06.2019 12:20
Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.
Answers: 1
The determination in problem 15-9 was modified to use the standard-addition method. in this case, a...
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