2 If a pharmacist added 12 g of azelaic acid to 50 g of an ointment containing 15% azelaic acid, what would be the final con- centration of azelaic acid in the ointment?
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- 6. One teaspoon of sertraline 20 mg/mL must be mixed into eight fluid ounces of water before consuming. Express the final concentration of sertraline when mixed with water as a ratio strength (w/v). Rounddenominator of ratio strength (w/v) to the nearest whole number.Given the following data forMass of test tube, beaker and cyclohexane = 100.17 gMass of test tube and beaker = 84.07 gFreezing point of cyclohexane = 6.59 oCMass of weighing paper + naphthalene =1.080 gMass of weighing paper = 0.928 gFreezing point solution = 5.11oCKf = 20.8oC/mDetermine the followinga. mass of cyclohexane in g (2 decimal places); _____b. mass of naphthalene in g (4 decimal places); _____c. freezing point depression (2 decimal places); _____d. molality of solution (3 significant figures); _____e. moles of naphthalene (3 significant figures); _____f. molar mass of naphthalene, experimentally (3 significant figures); _____g. % error if theoretical molar mass of naphthalene is 128.17 g/ mole, USE ABSOLUTE VALUE (3 significant figure); ____Sum of coefficients C7H8 + O2 --> CO2 + H2O after balancing
- Stock iron(II) solution (200Ug mL-1 Fe) ferrous ammonium sulfate hexahydrate mass= 0.1437g, transfer it to a 100 ml beaker. add 15 ml approx of water and 15m1 'approx of dilute sulphuric acid (2M H2SO.). then transfer FeII to 100 ml flask makeup to the mark with water. calculate the moles of ferrous ammonium sulfate hexahydrate solution in unit ug/mL.Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%. Write complete solution using padpaper.Benzoin Tincture 18 mL Peru Balsam 10 g Cold Cream 70 g Sig cold sore ointment If benzoin tincture has a specific gravity of 0.88, calculate its percentage strength (w/w) in the mixture.
- 2) A patient visits your pharmacy with a prescription for 200g Betnovate (betamethasone valerate) 0.1% w/w cream . The specials department has a Betnovate 2.5% w/w cream stock concentration.How much diluent needs to be added to the Betnovate 2.5% w/w cream in grams to produce the Betnovate 0.1% w/w cream for the prescription?State your answer to the nearest whole number.unit- gHow would you prepare 75 mL of an H2SO4 solution at 20% in weight (density=1.1394 g/mL, richness=227.9 g/L) starting from the commercial H2SO4 solution (98%, density=1.8361 g/mL, richness=1799 g/L)?What is the molarity of a concentrated solution of sulfuric acid with a specific gravity of 1.84 and 95.0% by weight sulfuric acid? specific gravity = density of substance at certain temp/density of water at 4 degrees C the density of water is 0.999973 g/mL at 4 degrees celsius. Describe how to prepare 3.0 L of 0.100M. I will pipet ______ and add this to 200mL water. The solution will be stirred and diluted to 3L with water.
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