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Two types of electrochemical cells which are based on thermodynamic principles can be described. Which of the following statements about these cells is correct?
A. The current in the external wire flows from cathode to anode in both cells.
B. Oxidation occurs at the cathode only in the voltaic cell.
C. The free energy change, ?G, is negative for the electrolytic cell.
D. The cathode is positive in a voltaic cell but negative in an electrolytic cell.
he initial rate of reaction of H2O2 -- H2O + 1/2O2 is found to be 1.7*10^-3 M S^-1. Assume that this rate holds for 2 minutes. Start with 165ml of 1.60M H2O2 at t=0. How many milliliters of O2 measured at 24C and 757mmHg
The vapor pressure of carbon tetrachloride, , is 0.354 atm and the vapor pressure of chloroform, is 0.526 atm at 316K . A solution is prepared from equal masses of these two compounds at this temperature
the following vibrational levels in the upper electronic state of I2: A) between v=1 and v= 0: b) between v=4 and v=3; and between v=21 and v=20. comment on and explain this trend in terms of the quantum mechanical concept of constraint.
The liberated hydrogen occupied a volume of 320ml when collected over water at 25 degrees celcius and the pressure of the gas was equalized to the atmospheric pressure of 750mm as in this lab. Calculate the equivalent weight of the metal, M.
Is the best description of the t2g orbitals in [CoCN6]3- bonding, non-bonding, or antibonding? Explain your choice.
(a) How many mL of KOH will it take to reach the equivalence point? (b) Calculate the pH at the equivalence point. The Ka of HClO is 3.8 x 10-8.
Show that the balanced equation obeys the law of conservation of mass.
The overall equilibrium involves Ksp, Ka3 of phosphoric acid and Kw. Construct the constant and show the three equations that apply.
CH4(g) + 2 O2 --> CO2(g) + H2O(g) suppose 1.5 mol of methane is allowed to react with 4 mol of oxygen. what is the limiting reagnant?
When synthesizing benzoic acid, a student used 0.2 mol Bromo Benzene, 0.3 mol Mg and 0.25 mol CO2. Write out the general equations, check limiting reagent and indicate the maximum yield of benzoic acid in moles.
According to the following reaction, how many moles of oxygen gas are necessary to form 0.221 moles nitrogen monoxide
Calculate the hydrogen ion concentration for an aqueous solution that has a pH of 3.45.
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