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The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on the next page. (a) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (b) What is the pH in the Pt | H+ | H2 half-cell? (c) What is the value of the equilibrium constant for the reaction occurring in this cell?
Consider the highest angle line on the diffraction pattern of Cu and of Pb, measured at 20 celsius with CuK radiation. by what percentage is the intensity of each of these lines reduced by thermal vibration of the atoms
The reaction of acylate ethylbenzene with acetylchloride using a friedel crafts reaction to give 4-ethylacetophenone, then react this with benzaldehyde (aldol)
C3H8(g)+5O2(g)->3CO2(g)+4H2O If 465 mL of oxygen at STP is used in the reaction, what volume of CO2 measured at 37 degrees C and 0.973 atm, is produced?
if potassium bromide of 25.5 grams is dissolved in enough H 2 O to make 1750 mL of solution, determine the molarity of the solution?
The following reaction occurs in basic solutions. What is the sum of the coefficients in the balanced equation. MnO4- + NH3 ----> NO3- + MnO2
A solution was prepared by mixing 70ml of 4.00 mol/L HCl and 30.0 mL of 8.00 mol/L HNO3. Water was then added until the final volume was 500ml. What is the [H+] and what is the pH ?
A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results from the trypsin, chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence of this decapeptide.
arrange the elements in order of decreasing first ionization energy.elementradiuselement x 107element y 198element z
Calculate the enthalpy change of the reaction for per mole potassium carbonate. Assume the specific heat of all solutions are 4.18 J/g°C and all solutions have a density=1.0 g/ml (A:-13.3 KJ) show all calculations please
Why are some covalent bonds polar and others aren't? Understand why the covalent bonds of water are polar and those in the hydrogen molecule (H2) are non-polar.
when that precipitate was treated with NH3 it turned black. Based on this what can you say about the ions that may be present or absent in the solution? Can you reach a conclusion about the presence or absence of each of the three ions based on th..
what is the total number of liters of O2 at STP needed to produce 6.0 times 10^23 molecules of H2O.
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