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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.
What is the molar concentration of the solution? How many moles of solute are in the solution? What is the molar mass of the solute?
Four different amino acids can be combined in different sequences to form how many different tetrapeptides?
What is the standard free-energy change ?G° at 25°C? (c) Calculate the equilibrium constant Kp at 25°C. (d) Calculate the equilibrium constant Kc at 25°C. (e) Calculate the temperature at which HgO decomposes to O2 at 1atm.
Suppose that a 4.0 L sample of gas at 1.0 atm is heated from 44°C to 53°C, during this process the volume doubles. What will the final pressure of the gas sample be
Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 130.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.450 M Ba(OH)2.
coal can be used to generate hydrogen gas a potential fuel by the following endothermic reaction.cs h2og lt gt cog
Draw Lewis structures to determine which of the following compounds exhibit resonance. Enter the letters corresponding to all those compounds which exhibit resonance
If 1.50g (NH4)2SO4 is dissolved in enough water to form 250 ml of solution, what is the molarity of the solution.
A solution of a dye absorbs light of wavelength 480 nm, and for this absorption, the extinction coefficient is 18600 L/mol/cm. A sample of the dye of unknown concentration is placed in an optical cell of path length 1 cm
consider a cup of coffee that has a temperature of 93oc. assume the mass of the coffee is 550 g and that the specific
What is the pressure inside a system when the system-side column in an open mercury manometer is 75.0 mm lower than the atmosphere side when the atmospheric pressure is 735 mm Hg?
A beaker with 160 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.40 mL of a 0.400 it M HCl solution to the beaker. How much will the..
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