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A voltaic cell consists of a Pb/Pb2+ half-cell and a Cu/Cu2+ half-cell at 25 C. The initial concentrations of Pb2+ and Cu2+ are 5.20×10-2 M and 1.60 M, respectively.
What are the concentrations of Pb2+ and Cu2+ when the cell potential falls to 0.370 V?
Compare the term symbols for the ground state configuration and the first excited state configuration of He. Which term symbol represents the lowest energy state for each configuration
Naturally occurring chlorine is composed of 35Cl and 37Cl. The atomic weight of chlorine is 35.453. What are the percentages of 35Cl and 37Cl in naturally occurring chlorine. Assume that the mass of 35Cl and 37Cl are 35 and 37 amu respectively.
The efficiency of light source = energy of visible light/ total energy 7. What is the relationship between light intensity and distance from the source?
Classify the following bonds as ionic, polar covalent, or covalent, and give your reasons: (a) the CC bond in H3CCH3, (b) the KI bond in KI, (c) the NB bond in H3NBCl3, (d) the CF bond in CF4.
Complete and balance the molecular, ionic, and net ionic equations for the following reactions.
Why is it preferable to use a metal ion buffer to achieve pM = 7, rather than just dissolving enough M to give a 10-7 M solution?
An empty flask weighs 252.2 grams. When filled with water ( d= 1.00 g/cm3) the flask and its contents weigh 591.8 g)
a green leaf has a surface area of 2.10 rm cm2. if solar radiation is 1030 rm wm2 how many photons strike the leaf
gives a straight line with a slope equal to -5100 K. What is the activation energy for the reaction?
Calculate the pH of the solution after the addition of 30ml of 0.1M NaOH. Show you work. Draw the structure of the form is His predominating in solution at neutral pH.
The thermodynamic properties for a reaction are related by the equation that defines the standard free energy, Delta G circ, in kJ/mol: Delta G circ=Delta H circ-T Delta S circ where Delta H circ is the standard enthalpy change in kJ/mol and Delta..
Consider the gases CH4, O2, and CO2, all at the same temperature. Arrange the gases in order of increasing average molecular speed. How does the average EK of the gases compare
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