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Titanium (work function = 6.94 x 10^-19 J) and silicon (work function = 7.24 x 10^-19 J) surfaces are irradiated with UV radiation with a wavelength of 250 nm. Which surface emits electrons with the longer wavelength? What is the wavelength of the electrons emitted by the titanium surface?
What is the concentration of OH (in M) initially present in a 12 M NH solution? Hint: The K of NH is 1.8x10. Express your answer to two significant figures.
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
When the lone pair of electrons in SF4 is placed at the equatorial position, which of the following is true. The molecular geometry is trigonal bipyramidal.
What is the molarity of an unknown H2C2O4 solution if 10.0 mL of the H2C2O4 solution required 21.3 mL of 0.025 M KMnO4 solution to obtain
Vanadium(III) can reduce nitrate ion (NO3-) to nitrite ion (NO2-), producing VOCl3 also Write the BALANCED chemical equation for this reaction.
Draw a potential energy diagram for the rotation about the 3,4 carbon-carbon bond plotting potential energy versus torsion angle for 2-methylhexane
A corrosionist pipetted a 50.00 ml sample of an unknown brine and titrated it with 37.64 ml of 0.1024 M silver nitrate solution. Calculate the ppm of salt (NaCl)in the sample.
using a sample of 35.00 ml of hcl solution after titrating it with a 0.1477 m naoh solution. it is observed that a
What is the ground-state electron configuration of the fluoride ion F-? Express your answer in condensed form, in order of increasing orbital energy.
When the flask is allowed to cool the vapor condenses and aire again refulls the flask. Re weighing the flask and figure out the the wight of the unknown vapor which filled the flask during the boiling. Is the error in volume measurement or the err..
what is the change in enthropy for this process in kJ/K*mole. The atomic mass of oxygen is 16.00.
A solution is made by taking 54.62 g of K2CrO4 in enough water to make 250.0 mL of solution. The molarity of the solution is therefore
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