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Einstein's 1905 paper on the photoelectric effect was the first important application of Planck's quantum hypothesis. Describe Planck's original hypothesis, and explain how Einstein made use of it in his theory of the photoelectric effect.
What is the pH of a solution obtained by mixing 50mL of 0.02 M sodium acetate with 40mL of 0.01 M HCl.
An element has three naturally occurring isotopes, calculate the percent abundance and the atomic mass
Two solutions are mixed together; A solutions containing 0.0032 moles of HNO3 and a solutions containing 0.00421 moles of NaOH. How much NaoH will remain after the reaction
A student tried the Wittig reaction experiment and did not notice the development of a yellow color when she treated benzyltriphenylphosphonium chloride with sodium ethoxide
Offer the experimental procedure necessary to make the subsequent solution- 10.00mL of a 0.0300M solution of CH3COOH from a stock solution with a concentration of 0.0780M
Consider the hydrogen atom line spectrum for transitions in the infrared region of the electromagnetic spectrum. The line corresponding to wavelength 1.28μm corresponds to the electron transition from n=5 to what level?
Rhodium has a density of 12.41 g/cm3 and crystallizes in a face-centered cubic lattice. Calculate the radius of a rhodium atom?
A 52.2 mg portion of tri-protonated arginine is disolved in 995.5ml of distilled ,deionized water. then 4.5mls of 0.15N NaOH is added . what is the pH of the resulting 1 litter solution
A solution is made by dissolving 36.0 g of ethanol (C2H5OH) in enough water to make 6.33 liters of solution. What is the molarity of the solution? (note:one mole of ethanol weighs 46.07 g)
what is the molar mass of toluene of 0.85g of toluene depresses the freezing point of 100g of benzene by 0.47cdegrees?
Write the balanced chemical reaction for the oxidation of sucrose C12H22O11 (s) to carbon dioxide gas and liquid water calculate ?H, ?U, and ?S for the reaction How much of this energy change can be extracted as
calculate the concentration of all soluble Hg(II) species. Which Hg(II) species is most prevalent? Assume there are no solids present, that the major ligands present are Cl- and OH-, and ignore activity corrections.
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