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Titanium has a work function of 6.94x10^-19 J and Silicon has a work function of 7.24x10^-19 J. The 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?
a 4.867 g sample of a monoprotic acid was dissolved in water. it took 30.24 ml of a 0.1578 m naoh solution to
If a sample of barium contains 2.3 x 1023 atoms of barium, how many grams of barium are in the sample?
Fish produce glycerol to survive the freezing waters of the Arctic. Determine the degree to which the freezing point of blood and other biological fluids is lowered with the help of glycerol. What is the ideal concentration range of glycerol requi..
The reaction is spontaneous at all temperatures C) It is impossible to determine if the reaction is spontaneous without calculations D) The reaction will only be spontaneous at low temperatures E) The reaction will only be spontaneous at high temp..
If Dan is working in the lab and measures the mass of an iron rod to be 1.25 g and the accepted value from the instructor was given as 1.30 g, what was dan's percent error
Using the alpha diagram for carbonate in a closed system, at what pH would the molar CO2 concentration be approximately equal to the molar bicarbonate concentration
A gaseous mixture of O2 and Kr has a density of 1.180 g/L at 355 torr and 300. K. What is the mole percent O2 in the mixture?
describe any important differences between benzopinacol and benzopinacolone in the ir and hnmr
A covalent compound is composed of a nitrogen atom, a hydrogen atom, and a carbon atom. How many electrons should the Lewis structure of the covalent compound contain
Initially a container contains 0.75 M HBr and no product. What is the equilibrium concentration of HBr if the equilibrium concentration of H2 is 0.14 M
The number of nuclei decaying in a sample of Gallium-68 decreased by a factor of 4 over a period of 136.6 minutes. What is the half life of this isotope
The H2O molecule has a bond angle of 105. What type of atomic orbitals does oxygen use to form the two equivalent sigma bonds with H
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