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If a current of 724.2 mA is passed through an electrochemical cell for 48.32 minutes, what charge, in coulombs, is passed through the cell? Charge passed through the cell = ?coulombs Suppose that the electrochemical cell consists of two copper electrodes immersed in a copper(II) sulfate solution. At which electrode, anode or cathode, does oxidation occur? The oxidation occurs at the ? Do you expect that this electrode will increase or decrease in mass as the electrolysis proceeds? The mass of the electrode will ? Calculate the change in the mass of copper at the anode or cathode if the charge calculated above is passed through the cell described. Enter your answer as a positive quantity in mg. Mass change at the electrode = ? mg
Calculate the volume of 6.15% (mass solute/volume solution) sodium hypochlorite ("bleach") that will be required to make 250 mL of 0.500 M sodium hypochlorite.
Calculated what is the pressure exerted by the tweezers on the floor at the moment of impact
Determine which flask has the smallest amount of water vapour and which one has greater vapor pressure of H 2 O?
The first-order rate constant for the decomposition of N2O5, 2N2O5 --> 4NO2 + O2 at 70 degrees C is 6.82 * 10 ^-3 . Suppose we start with 2.90×10?2 of in a volume of 1.7 L. A)
An antacid tablet containing magnesium hydroxide as an active ingredient requires 22.6 mL of 0.597 M HCl for complete neutralization. What mass of Mg(OH)2 did the tablet contain?
What is the Ag+ concentration when BaCrO4 just starts to precipitate? The Ksp for Ag2CrO4 and BaCrO4 are 1.1 x 10-12 and respectively.
What is the value of at this temperature? 23.15 At this temperature the rate constant for the reverse reaction is 310. . What is for the reaction?
A room contains 45 kg of air.How many kilowatt-hours of energy are necessary to heat the air in the house from 5 C to 29 C? The heat capacity of air is 1.03 J/ g C.
calculate the number of microstates, W, that have this energy. Make sketches of these microstates. Calculate the corresponding entropy for each state.
What is the expected freezing point of a solution of 110.5 g of H2SO4 in 225 g of water? Assume sulfuric acid completely dissociates in water.
In Horner-Wadsworth-Emmons reaction, a 1,2-disubstituted alkene was produced in which the olefinic protons exhibited at vicinal coupling of 9.0 Hz in the 1H NMR. What is the stoichiometry of the double bond.
Consider the molecule cyclohexane, which contains only hydrogen and carbon atoms. When a sample is burned in oxygen, 4.822 g of CO(2) and 1.650g of H(2)O are obtained. What is its simplest formula?
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