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When a particular metal is illuminated with photons, one electron is observed for each absorbed photon. What effect would decreasing the wavelength and number of photons, have on the electrons leaving the surface? Please show all work.
Calculate the heat of a reaction if 12.5 g CaCl is dissolved in 105 g of water and the temperature decreases from 22 degrees C to 15 degrees C. Assume the specific heat of the solution is 4.184 J/g degrees C. Is the reaction endothermic or exother..
In an ethanol-chloroform solution in which the mole fraction of ethanol is 0.20, the total vapor pressure is 304.2 torr, and the mole fraction of ethanol in the vapor is 0.138. Calculate the activity coefficients of the ethanol and the chloroform.
Balance the following full redox reactions using the lowest integer coefficients, in basic conditions. NiO2(s) + Zn(s) ? Ni(OH)2(s) + ZnO22?(aq)
State the equilibrium concentration of each component that makes the solution a buffer solution. Ka = 1.8 x 10-5 for acetic acid.
One model of the hydrogen atom relies upon the idea that the electrons reside in stable orbits from which they can not deviate and are found outside of a small, densely packed group of protons. This model was created by
What accelerating voltage is required to pass a N O +3 molecule through the exit slit of a magnetic sector mass spectrometer if the magnet has a field strength of 0.240T and the radius of curvature
The air pollutant NO is produced in automobile engines because of the high-temperature reaction below. If the initial concentrations of N2 and O2 at 1000 K are both 1 M, what are the concentrations of NO, N2, and O2 when the reaction mixture reach..
The half-life for the reaction at 550C is 81.3 seconds. How long does it take for 89% of phosphine sample to decompose?
Write the chemical equation for the formation of CH from H and C atoms. Lone pairs do not need to be included. Then Using the table of bond energies determine the ?H for the above reaction.
which of the following alkyl halides reacts most rapidly via SN1 solvolysis reaction in hot methanol? A) 1-iodo-1-methylcyclohexane
How many ATP molecules are produced by energy generated when electrons flow from NADH to oxygen (O2)
A peptide with the amino acid sequence C-P=T-Y-R-L-D-Q (MW = 995.12 g/mol) is dissolved in this solution at a concentration of 5 micromol.
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