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The solutions at the two Pb electrodes of a concentration cell were prepared as follows: Cell A: A mixture of 1.00 mL of 0.0500 M Pb(NO3)2 with 4.00 mL of 0.0500 M KX (the soluble potassium salt of an unspecified monovalent ion X-). Some PbX2(s) precipitates. Cell B: 5.00 mL of 0.0500 M Pb(NO3)2. The cell potential was measured to be 0.06800 V at 25 °C. By use of the Nernst equation, determine the concentration (M) of Pb2+ in the solution of Cell A.
A solution is prepared by mixing 50.0 mL of 0.20 M Pb(NO3)2 with 50.0 mL of 1.5 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. [Ksp for PbCl2(s) is 1.6 10-5.]
What is the final concentration of a BSA solution made from 400 uL of stock BSA solution (initial concentration 500 mg/mL) diluted with 1600 uL of water
He diffuses faster than Ar because He is smaller has a higher average speed is less reactive is heavier
The estimated costs for remodeling the interior of an apartment are: three gallon cans of paint at $13.22 each (including tax), two paint brushes at $9.53 each (including tax), and $135 for a helper.
The vapor pressure of water at 25 degrees Celcius is 23.8mmHg ( use the equation for calculating the vapor pressure lowering. Raoult's law to get to moles
CaCN2 + 3 H2O → CaCO3 + 2 NH3 . How much CaCO3 is produced if 47.5 moles NH3 are produced?
What is the molarity of the carbonate ion in sodium carbonate, Na2CO3, prepared by dissolving 3.5 g of sodium carbonate in enough water to form 0.800 L of solution?
One of the most historically significant studies of chemical reaction rates was that by M. Bodenstein (Z. Physik. Chem. 29 (1899) 295) of the gas phase reaction and its reverse, with rate constants and , respectively. The measured rate constants a..
In an excess amount of oxygen, how many grams of CO2 (g) are theoretically produced from the combustion of 901.0 g of glucose [C6H12O6 (s), molar mass of 180.2 g/mol]?
Suppose that an atmospheric chemist combines 165 of methane at STP, 870 of oxygen at STP, and 56.5 of at STP in a 1.8 flask.
A hypothetical compound XY has an actual molar mass of 62.8562 g/mol, but it was experimentally determined to have a molar mass of 63.0196. Calculate the absolute and relative errors.
Calculate the pH of a solution prepared by dissolving 0.30 g of BaO in enough water to make 0.800 L of solution.
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