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The solubility product of PbBr2 is 8.9x10^-6. Determine the molar solubility a) in pure water, b) in 0.20M KBr solution, c) in 0.20M Pb(NO3)2 solution.
Dry ice sublimes at room temp. If 10.0 g of solid dry ice is placed in a 400 mL container, what will be the pressure in the container at 35 degrees C
The most common source of copper (rm Cu) is the mineral chalcopyrite (rm CuFeS_2). How many kilograms of chalcopyrite must be mined to obtain 230. g of pure rm Cu?
calculate the molar mass of naphthalene, the organic compound in "mothballs," if a solution prepared by dissolving 5.00g of naphthalene in exactly 100g of benzene has a freezing point 2.00 degrees celcius below that of pure benzene.
Calculate the binding energy per nucleon (in MeV) for P-30 (atomic mass = 29.9783 u). H = 1.007825 u and n = 1.008665 u.
Predict the sign of delta S_system for the following processes a) molten Fe solidifies b) LiCl_(s) is formed formed from Li_(s) and Cl2_(g)
The titration requires 34.11 mL of base to neutralize 15.00 mL of the acid. What is the Molarity if acid in the vinegar?
Which of the following combiantions of terms best describe the polymerization of a diisocyanate (OCN-R-NCO) and a diol to form a polyurethane
A syringe filled with air can be used to test the relationship between the temperature and the volume of a sample of gas. The syringe has a movable plunger that allows an enclosed sample of gas to be held at a constant external pressure, so the ga..
Liquid X has a certain partial pressure when in the pure state. Liquid Y is then added and after equilibration the partial pressure of X did not change. There is no Y vapor detected. Did the liquids mix? Explain.
The normal respiratory rate for a human being is 15.0 breaths per minute. The average volume of air for each breath is 0.505 L at 20.0°C and 9.95 x 104 Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters or..
How many grams of solute are needed to prepare 500.0 mL of a 0.375 M CH3OH solution.
The equilibrium constant of a reaction is found to fit the expression ln K = A + B/T + C/T^3 between 400 K and 500 K with A = -2.04, B = -1176 K, and C = 2.1 x 10^7 K^3. Calculate the standard reaction enthalpy and standard reaction entropy at 450..
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