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A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2×10?4M and 1.6M, respectively, in 1.0-liter half-cells.
What is the initial voltage of the battery? V=
What is the voltage of the battery after delivering 4.7A for 8.0hours? V=
How long can the battery deliver 4.7A before going dead? t=
why is the dissolving of ammonium chloride endotherimic? would you get similar results for dissolving all salts
A titration of 200.0 mL of 1.00 M H2A was done with 1.28 M NaOH. For the diprotic acid H2A, ka1 = 2.5 x 10^-5 and ka2 = 3.1 x 10^-9.
Benzoic acid has a Ka value of 6.3x10^-5. A 35 ml sample of .13 M benzoic acid is titrated with a .15M solution of NaOH.Find the pH.
For a silver-silver chloride electrode, the following potentials are observed- E° = 0.222 V E(saturated KCl) = 0.197 V Predict the value of E for a calomel electrode saturated with KCl, given that E° for the calomel electrode is 0.268 V
The mass of the water in the inner bath is 1.40×103g . The temperature of the calorimeter and its contents rises 2.83K as a result of this reaction. Calculate the calorimeter constant.
A mixture of 7.50 g He and 29.5 g Ne has a pressure of 540. mm Hg. What is the partial pressure of each of the gases?
Suppose a 500 mL solution contains 0.50 millimoles of Co(NO3)2, 100.0 millimoles of NH3, and 175.0 millimoles of ethylenediamine. What is the concentration of Co 2+ (aq) in the solution?
What is the oxidizing agent?
Draw a reaction coordinate diagram for a one-step, exothermic reaction in which the the thermodynamic product is not the kinetic product (that is, the most stable product is the slowest to form).
The double-replacement reaction below results in the formation of the precipitate lead chloride. Balance the equation and write the net ionic equation.
An unknown mass of each of the given substances as with The final temperature is recorded as indicated 1.Pyrex glass (tf=67.6 C), 2.Sand (tf=70.4 C), 3.ethanol (tf=45.9 C), initially at 19.0 degrees celsius, absorbs 1930 Joules of heat
Draw the Lewis Structure, and then specify the electron paor geometries for each of the following molecules or ions. Identify the hybridization of the central atom.
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