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Calculate the standard emf of a cell that uses the Mg/Mg^2+ and Cu/Cu^2+ half cell reactions at 25?C. Write the equation for the cell reaction that occurs standard-state conditions.
Calculate the vapor pressure of a solution made by dissolving 21.80 g of glucose (molar mass = 180.155 g/mol) in 460.0 g of H2O at 30.0 °C. (The vapor pressure of the pure solvent is 31.82 mmHg at 30.0 °C.)
what concentration of NH4+ must be present in a 0.20M aqueous ammonia solution to prevent the percipitation of Mg(OH)2 if the ammonia solution
A 150.0 mL sample of a 1.50 M solution of CuSO4 is mixed with a 150.0 mL sample of 3.00 M KOH in a coffee cup calorimeter. The temperature of both solutions and the calorimeter was 25.2°C before mixing and 31.3°C after mixing.
prove the presence of the cations listed : Sn2+ , cd2+, Cu2+, Bi3+. write four paragraphs about these cations a paragraph each?
how many grams of gold would plate on the metal used for the medallion? Explain what you are thinking as you show your calculations.
At an altitude of 45.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?
A buffer is prepared by dissolving 25.0 g of sodium acetate (NaC2H3O2), in 1.20 L of a solution of 0.560 M acetic acid (HC2H3O2). Assume that the volume remains the same after dissolving the NaC2H3O2
15.0 moles of gas are in a 8.00 L tank at 21.0C. Calculate the difference in pressure between methane and an ideal gas under these conditions
A solution is 0.0100 M in Pb2+ ions. If 0.103 mol of solid NaI is added to 1.00L of this solution (with negligible volume change), what percent of the Pb2+ ions remain in solution?
Illustrate the structures of the 6 bromoalkenes (with the molecular formula C5H9Br ) that have a branched C chain, and that show neither chirality nor E,Z isomerism.
Problem- Find the pH of the equivalence point and volume (mL) of 0.200 M HCL needed to reach the equivalence point in the titration of 65.5 mL of 0.234 M NH3.
Calculate the pH change after 100.0 mL of 0.0500M HCl is added to 400.0 mL of a buffer solution that is 0.200M in NH3 and 0.300M
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