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For the following electrochemical cell:Zn(s)| Zn2+(1 M) || H+(?M) | H2(1 atm)|Pt(a) What reaction takes place at the anode? (b) What reaction takes place at the cathode? (c) What is the overall cell reaction? (d) What is the pH of the solution in the cathode compartment ofthe following cell if the measured cell potential at 25 oC is 0.55V? (e) Calculate ΔG at 25oC.
Work function of chromium metal is 4.37 eV. What is the wavelength of radiation that must be supplied to metallic chromium to release and electron with kinetic energy of 2.05*10^-18 J
An excited hydrogen atom emits light with a frequency of 1.141 multiplied by 1014 Hz to reach the energy level for which n = 4. In what principal quantum level did the electron begin?
Hydrchloric acid is usually purchased in a concentrated form that is 37.0% HCL by mass and has a density of 1.20g/ml. How much concentrated solution would you take to prepare 2.85L of 0.410M HCl by mixing with water
Which of the following is a use for nuclear energy?
A 2.983 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution. To this solution was added 1.910 grams of KI and 50.00 mL of a 0.00894 M KIO3 solution.
caffeine c8h10n4o2is a stimulant found in tea and coffee. a sample of the substance was dissolved in 47.0 g of
Given the equation HCl + NaOH--> H2O + Na+ Cl-, how many moles of water are produced in this reaction. Additional info: .500M HCl used, .500 M NaOH used, and delta H^0 is known to be -57.86 kJ/mol water formed
Express the concentration of a 0.0620 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
Consider the following. You identify a line with a wavelength of 503 nm. Describe how you would go about determining which of the lines in table 1 of the experiment guide that it corresponds to.
A certain metal, M, forms two oxides, M2O and MO. If the percent by mass of M in M2O is 73.4%, what is its percent by mass in MO?
What is the activation energy for a reaction if its rate constant is found to triple when the temperature is raised
What is the total pressure of a mixture of gases made up of CO2, O2, and H2 if the partial pressures are 2.2atm, 400mmHg and 112kPa respectively.
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