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- An excess of 0.34 mg Pb is obtained from an assay test determined in an analysis. What is the percent relative error in ppt if the mass of the sample is 550 g?A 1 mL microbial suspension comparable to 1 mL of 1.0 McFarland standard was subjected to a series of dilutions. An aliquot of 0.2 mL was transferred into a 100-mL volumetric flask and diluted with sterile saline solution to its final volume. Then a 0.1 mL of the resulting solution was transferred into a 50-mL volumetric flask diluted to its final volume. What would be the final concentration?A patient weighs 164 pounds (1.000 pound = 0.454 kg). The patient requires a dose of a drug that is 4.50 mg/kg of body weight. You have a stock solution of the drug that is at a concentration of 60,000 ppm. The density of the stock solution is 1.16 g/mL. The drug has a molecular mass of 623.87 g/mol. You decide to give the patient the drug using an i.v. bag (intravenious injection) with a volume of 1.00 L and pump it into the patient at a rate of 10.0 ml/min. What volume of the stock solution of the drug do you need to add to the i.v. bag in order to ensure that the patient gets the correct dose?