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201.0 nm ultraviolet light strikes a metal plate and ejects electrons having kinetic energy E = 3.54 eV. Calculate the binding energy of an electron at the metal surface
Use the mean value that you determined for Keq to calculate the SCN- concentration in a solution Fe3+ concentration was 4.00 X10-2M and initial SCN- concentration was 1.00 X10-3 M. Is all of theSCN- in the form ofFeNCS2+?
The specific heat of ethanol is 2.44j/g times degrees celcius. How many kilojoules of energy are required to heat 50.0 g of ethanol from -20.0 degrees celcius to 68.0?
Consult your lecture or lab text and give a complete structuer for the 'intermediate borate ester' formed in the reduction of 2-butanone with NaBH4. Why is it necessary to add water after the reaction is complete?
1.find the ph of a 0.65 m solution of propionic acid. what is the fraction ionized at equilibrium?2. what is the
If the solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 202 kPa?
Can someone please give me an example of the balanced redox equation for Cu2+ from one of the Qual I cations? An explanation would be great.
4.5 L of Mg(OH)2 solution was titrated with 5.03 mL of 0.200 M HCl. Calculate the the molarity of Mg(OH)2 solution and the ksp.
a tanker truck carrying 5.0 x 103 kg of concentrated sulfuric acid h2so4 tips over and spills its load. if the solution
solid nacl is added slowly to a solution containing 0.10 m agno3 and 0.20 m pbno32. ksp for agcl is 1.8x10-10. ksp for
Calculate the concentration of all species in a 0.100 M phosphorous acid solution. These species include {H3O}, {H2PO3} and {HPO3^2-}. For phosphorous acid, ka1=3.0*10^-2 and Ka2=1.7*10^-7
If 2 new elements have been discovered and one is R, a new element from the family with 3 valence electrons and Z, a new element from the family with 6 valence electrons. Write the formula for the binary compound between element R and element Z.
The lattice energies of FeCl3, FeCl2, and Fe2O3 are (in no particular order) -2631 kJ/mol, -5339 kJ/mol, and -14,774 kJ/mol. Match the appropriate formula to each lattice energy.
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