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- Explain the difference between random sampling and haphazard sampling as used in Analytical chemistry.use analytical separation and analyses to outline analytical separation method protocols that can be employed to recover extremely high deposit of heavy metals and particulate matter in the river making wholesome for drinking in illegal mining communities .Consider the following two standard deviation values: 0.100 grams/mol and 1.00 grams/mol. Which of these numbers signifies a more consistent—and likely higher quality—analytical technique? Explain.
- Why high performance liquid chromatography is an important technique in the fields of chemistry explain the various reasons?What is instrumental analysis in chemistry?[References) A method for the determination of the corticosteroid methylprednisolone acetate in solutions obtained from pharmaceutical preparations yielded a mean value of 3.7 mg mL with a standard deviation of 0.3 mg mL. For quality control purposes, the relative uncertainty in the concentration should be no more than 3%. How many samples of each batch should be analyzed to ensure that the relative standard deviation does not exceed 9% at the 95% confidence level? samples
- What are the advantages and disadvantages of volumetric and gravimetric analysis?ESF X empt/quiz_start_frame_auto.d21?ou=9739790&isprv=&qi=11007766&cfql=0&dnb=0&fromQB=0&inProgress=1 ystems Question 5 (1 point) Ben starts walking along a path at 3 mi hr¹. Amanda starts jogging along the same path 1 hour later at 5 mi hr. After how much time jogging does Amanda catch up to Ben? 3.5 hr 2.5 hr 2 hr 16Time required to elute substance Z when N = 1000 = when N = 2000 The two quantities cannot be compared due to insufficient information. when N = 1000 > when N = 2000 %3D when N = 1000 < when N = 2000
- Q3. A cellulose coating that weighs at least 3.00 mg is often applied to the exterior of vitamin C tablets in order to delay the release of active ingredients. A random sampling of 100 vitamin tablets revealed that 6 vitamin tablets failed to meet the required weight of the cellulose coating. (а) Calculate the relative standard deviation (in %). (b) Determine the number of tablets should be taken into consideration to ensure a relative standard deviation of 15 %.A young researcher was evaluating a standard method for determining the methylmercury content in blue fin tuna using high performance liquid chromatography (HPLC). She determined the standard deviation (?)(s) for the method to be 0.440.44 ppb and assumed that ?s was a good approximation of ?σ . As a test, she used this method to evaluate the methylmercury content in a National Institutes of Standards and Technology (NIST) standard and determined the unknown amount to be within 0.210.21 ppb (?)(μ) of the known mean with 99% probability. How many replicate measurements of the NIST standard did the researcher perform?Write down three possible applications of the analytical ultracentrifuge