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A 0.2 g sample of pyrolusite is analyzed for manganese content as follows. Add 50.0 mL of a 0.10 M solution of ferrous ammonium sulfate to reduce the MnO2 to Mn2+. After reduction is complete, the excess ferrous ion is titrated in acid solution with 0.0200 M KMno4, requiring 15.0 mL. Calculate the percent manganese in the sample as Mn3O4 (only part or none of the manganese may exist in this form, but we can make the calculations on the assumption that it does)
Calculate the molarity of a solution of glycerol made by dissolving 38.000 mL glycerol at 15C(density: 1.2656g/mL) in enough water to make 230.00 mL of solution.
How much heat is evolved when 9.07 x 105 g of ammonia is produced according to the following equation:
Which of the following molecules would be expected to be MOST water soluble?
Determine the theoretical and percent yields of ethanol if 684g sucrose undergoes fermentation and 349g ethanol is obtained?
Find out the concentration of this solution in a)M (molarity), b) m (molality), c) % w/w (percent by mass). If solvent =, H 2 O.
What is the density in g/L of a gas mixture that contains 27% F2 and 73% He by volume at 714 mm Hg and 27.5 C.
A spoon was silver plated electrolytically in a Silver nitrate solution. If 0.750 grams of silver was deposited on the spoon at a constant current of twenty mili amperes, determine how long in hours did the electrolysis take?
Explain why the dichlorofluoresceinate anion is adsorbed onto the surface of the AgCl precipitate
a 55.0g piece of copper wire is heated, and the temperature of the wire changes from 19.0C to 86.0C. The amount of heat absorbed is 1.4 kilojoules. What is the specific heat of copper?
solution with a pipet to a second 500.0 mL volumetric flask and diluting to the mark. Find the concentration of Ag+ in the dilute solution.
A tire has a pressure of 780 mmHg at 27°C. If the tire is heated to 47°C on hot pavement, what the new pressure will be:
What IR stretches (and ranges) will occur in? What IR stretches (and ranges) will occur in an aldehyde, but not an alcohol or ketone and IR stretches (and ranges)
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