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If an incoming energy to a photoelectric effect problem is 2.35 x 109 MHz and you hit a metal surface that has an ionization energy of 6.5 x 10-19J, what would the wavelength of the ejected electron be?
Calculate the temperature change which will be caused by the following process: 0.640 moles of NH4Cl are dissolved in 1.00 L of water.
What is the pH for a buffer solution containing 0.49 molar acetic acid and 0.02 molar potassium acetate
Determine the wavelength, in nanometers, of radiation with of 218 kj/mol energy. please show how you came up with answer
The chloride of an unknown metal is believed to have the formula MCl 3. A 1.891g g sample of the compound is found to contain 3.606×10^-2 mol. Find the atomic mass of M.
calculate the change in internal energy when 2 moles of CO are converted to 2 moles of CO2 at 1 bar and 25 degrees C
What was the concentration (mol/L) of the permanganate solution. Submit answers correct to two decimal places.
A 1.20 sample of dry ice is added to a 745 mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 735mmHg .
This results in the formation of the highly colored FeSCN2+ complex ion. To do this analysis, a standard solution containing 5.00x10^-5 M Fe3+ was prepared. After addition of excess SCN-, the absorption of the standard solution =0.363 at 580 nm.
An electron moves from the n=1 to the n=6 energy level. The value of the Rydberg constant is RH = 1.097 x 107 m-1. Is energy emitted or absorbed. What is the wavelength of the energy emitted or absorbed (in meters)
What is the pH of the benzoic acid solution prior to adding sodium benzoate? Express answer using 3 significant figures. 2. How many grams of sodium benzoate should be added to prepare the buffer?
the substitution reaction of (2R)-2-bromopentane and CH3O- undergoes substitution with NaOCH3.
how many grams of acetylene are produced by adding water to 5g of CaC2?
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