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A beam of UV light of wavelength 200nm is able to eject electrons out of a certain metal, and the ejected electrons have the speed v=1.06x10^6 m/s. What will be the speed of the electrons ejected from the same metal by a light of wavelength 180nm?
Calculate the heat change of the calorimeter (Qcal) for this process and report it below with the correct number of significant figures
1.What is the effect of the following on the observed melting point of the compound: a) insoluble purity, such as charcoal; b) incomplete drying of the sample; c) less recrystallization solvent was used than it was needed?
A sample of oxygen that occupies 1.00 × 10-6 mL at 575 mm Hg is subjected to a pressure of 1.25 atm. What will the final volume of the sample be if the temperature is held constant
a particle moving 30,816 km/hr has a wavelength of 725 nm. What is the mass of the particle?
Calculate the volume of glacial acetic acid needed to make 1L of the buffer. Glacial acetic acid is 99.5% acetic acid
In the experiment aniline and acetic anhydride are reacted to form acetanilide, how do you calculate the theoretical yield of acetanilide?
what is the keq value for the acid base reaction between sulfuric acid and nitric acid? Assume that pka of the conjugated acid of nitric acid is -13.
The peak absorbance of the first chromatographic peak at 300nm was 0.020 and at 350nm 0.030. What is the main component of the first eluting peak and what percentage of the total absorbance at 300nm is due to this component?(assuming the light pat..
Describe in detail(ex:individual resins used, etc) the purification of a protein from bovine live that has the following characteristics: Molecular weight of 86,500, pI= 8 and precipitates out of solution at 30% ammonium sulfate
A Si wafer is treated in phosphorus vapor at 1000o C so that the phosphorus concentration at the surface is kept at the solubility limit of 1021/cm3.
A flask is charged with 0.140 mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction. A(g) B(g) The following data are collected. times (s) 0 40 80 120 160 moles of A 0.140 0.068 0.049 0.031 0.019 (a)
A 29.0-g sample of water at 250. K is mixed with 51.0 g water at 320. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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