When Dr. Harris was a boy, Uncle Wilbur let me watch as he analyzed the ironcontent of runo± from his banana ranch. A 5.00 mL sample was acidi²ed withnitric acid and treated with excess KSCN to form a red complex. (KSCN iscolorless). The solution was then diluted to 25.00 mL and put in a variablepathlength cell. ³or comparison, a 10.0 mL reference sample of 7.62 x 10-4M³e3+was treated with HNO3and KSCN and diluted to 25.00 mL. This referencesample was placed in a 1.00 cm light path. The runo± sample exhibited thesame absorbance as the reference when the path length of the runo± cellwas 4.08 cm. What was the concentration of iron in ppm ³e (not M) in UncleWilbur's runo±?
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Chemistry, 22.06.2019 17:10
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Chemistry, 22.06.2019 22:00
If a solution contains 3 moles/liter of sodium chloride (nacl, made of sodium ions and chloride ions), what is the osmolarity of this solution
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Chemistry, 22.06.2019 22:30
Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.
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Chemistry, 23.06.2019 07:00
Select the correct answer. why are scientific models important in the study of science? a. they always involve critical mathematical calculations. b. they scientists understand complex ideas and objects that aren’t easy to handle. c. they enable scientists to popularize their work in society. d. they are required when conducting any peer review process. e. they are necessary for turning a hypothesis into a law.
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When Dr. Harris was a boy, Uncle Wilbur let me watch as he analyzed the ironcontent of runo± from hi...
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