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A student standardizes his/her DCP solution. S/he prepares a vitamin C solution that contains 53.9 mg vitamin C in 100.00 mL. S/he takes a 10.00 mL aliquot, adds water and buffer, and then titrates with 36.5 mL DCP to reach the end point. S/he next titrates an unknown sample with this DCP solution and reaches the end point at 40.5 mL. How many mg of ascorbic acid were present in the unknown sample
determine the number and type of donor atoms in the ligand. Options include: a) 4 N and 2 O, b) 2 N and 2 O, c) 4 N and 4 O, d) 2 N and 4 O
A 500-g sample of Al2(SO4)3 is reacted with 450 g of Ca(OH)2. A total of 596 g of CaSO4 is produced. What is the limiting reagent in this reaction, and how many moles of excess reagent are unreacted?
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [N2]eq = 3.6 M, [O2]eq = 4.1 M, [N2O]eq = 3.3 × 10-18 M.
What is the volume of 135 mL of oxygen gas at 113°C and 870. mm Hg if the conditions are adjusted to STP? Assume the amount of gas is held constant.
Hydration of alkynes (via oxymercuration) gives good yields of single compounds only with symmetrical or terminal alkynes
What is the pH of a buffer solution that is 0.211 M in lactic acid and 0.111 M in sodium lactate? The Ka of lactic acid is 1.4 × 10-4.
Update the backbone to properly show a tripeptide, and add side chains and hydrogen atoms to show Gly-Phe-Tyr.
Consider a small lake, 0.4 mile across and 11 ft deep, that contains a total of 50 tons of dissolved oxygen. Calculate the BOD (i.e. calculate the amount of oxygen required to degrade the amount of organic waste given)
If 55.4 mL of BaCl2 solution is needed to precipitate all the sulfate ion in a 740 mg sample of Na2SO4, what is the molarity of the solution?
The normal boiling point of ether is 307.8 K. Calculate the temperature at which its vapor pressure is exactly half of that at its normal boiling point.
What volume and mass of steam at 100.°C and 1.00 atm would, during condensation, release the same amount of heat as 100. cm3 of liquid water during freezing.
Explore the effects of acid rain pre and post the 1990 Clean Air Act. Pair up and choose one of the topics listed below. One person should research and report on the damage that was being observed due to acid rain prior to 1990.
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