When 0.2 millimoles of Y are dissolved in 250 ml of water, the resultant solution has an absorbance of 1.6. What is the molar extinction coefficient of Y?
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When 0.2 millimoles of Y are dissolved in 250 ml of water, the resultant solution has an absorbance of 1.6. What is the molar extinction coefficient of Y?
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- What is the Molarity of 10 grams of NaCl dissolved in 3L of solvent?How many mL of methadone is needed for a patient who was prescribed 0.015 g of methadone? The vial reads 6 milligrams of methadone per 1 mL of solution.Assume that you have a stock solution of 10% SDS and you need to make 150 microliters of 0.5% SDS. What volume of 10% SDS and what volume of water would you use?
- An analysis of city drinking water for total hardness was done by two students in the laboratory and produced the following results (in ppm CaCO3): Student A: 228.3, 226.4, 226.9, 227.1, and 228.6. Student B: 229.5, 226.1, 230.7, 223.8, and 227.5 1. Calculate the following for each data set: (proper significant figures, neglect units) a) Mean for student A b) Mean for student B c) Relative standard deviation for student A d) Relative standard deviation for student B e) Confidence Level for Student A at 95% (write as a range for example: 200-300) f) Confidence Level for Student B at 95% (write as a range for example: 200-300) g) Which of the student have a more precise result? (write STUDENT A or STUDENT B)The pH of a solution containing 20 mL of 0.120 N NaOH and 35 mL of 0.120 N NaOH is 1.49. True or False?The molarity of naoh is 0.1715