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Which of the following solvents would be the best choice to extract a slightly-polar organic compound from an aqueous solution? Explain why each of other solvents is less desirable than the solvent you have chosen. (Structures and dielectric constants of solvents are given in Table 8.2 of the CHEM 326 text (Loudon)).
Acetonitrile Dimethyl formamide Hexane Methylene Chloride
How many milliliters of a 0.20 M glucose C6H12O6 solution are needed to provide a total of 25.0 g of glucose?
What mass percent of ethylene glycol in water must be used to reduce the freezing point of the mixture to -5.0degrees c?
Suppose that 50.0g of Zinc and 50.0g of Iodine are used to form Zinc (II) Iodide. Answer the following questions: (A) What is the limiting reagent?
The water level in a graduated cylinder initially at 211 rises to 282 after a piece of lead is submerged. What is the mass in grams of the lead.
Find the molarity of a Ca(OH)2 solution,given that 388 mL of it is neutralized in a titration by 117 mL of 0.0058 M HNO3.
Determine the sign of ΔS sys and ΔS surr for each chemical reaction.2CO(g)+O 2 (g)?2CO 2 (g)ΔH ° rxn = -566.0 kJ. Choose from:
what is the concentration of fructose in the resulting solution in uM? C) If you make three serial 1:5 dilutions, using the solution above, what is the concentration of the final solution?
The heat capactiy of the calorimeter is 1630 J/degrees celsius, and the inital temperature was 24.58 degrees celsius. What was the final temperature in degrees celsius?
A 515 g piece of copper tubing is heated to 95.0°C and placed in an insulated vessel containing 57.0 g of water at 30.0°C.
When 2 moles of Mg3N2 are allowed to react with water to form ammonia gas and magnesium oxide, how many moles of H2O are required?
0.1278- sample that is 97.50% As2O3 by mass had been used in the titration, how many milliliters of the 0.02140M KMnO4(aq) would have been required?
Assume no heat is lost to the surroundings. The normal boiling point of methane is -161.5 C. The specific heats of liquid and gaseous methane are 3.48 and 2.22 J/g.K, respectively. A)liquid B)gaseous C)solid
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