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The energy levels of hydrogenlike one-electron ions of atomic number Z differ from those of hydrogen by a factor of Z^2. Predict the wavelength of the transition from n=2 to n=1 in He+
Calculate the solubility of zinc hydroxide Zn(OH)2 in 1.10 M NaOH. Ksp=3.0x10^-16 for Zn(OH)2 Kf=3.0x10^15 for Zn(OH)4^-2
Four atoms of iron (Fe) are to be combined with three molecules of oxygen (O2). How many total iron atoms and oxygen molecules will be combined during the formation of Fe3O4?
The first ionization energy of bismuth is Ei1 = +703 kJ / mol. What is the longest possible wavelength of light that could ionize an atom of bismuth?
How many grams of CuCl2 are required to prepare 1220. g of a 1.65% (by mass) CuCl2 solution?
Compute the number of moles of sodium hydroxide ( NaOH ) in 23.75cm 3 of 0.150moldm -3
Starting with aziridine, and using 1) PhCH2Br; 2) Na2CO3; 3) PhCH2Br as reagents, what are the mechanisms and intermediates leading to a final product
Write the structures of the products you would expect to get if you react N-cinnamaldehyde-m-nitroaniline with catalytic hydrogenation (that means adding H2 and Pt or Pd).
The rate constant of a reaction is 4.7 10-3 s-1 at 24°C and the activation energy is 33.6 kJ/mol. What is the value of k at 75°C?
In the laboratory you are asked to make a 0.648 m cobalt (II) bromide solution using 350 grams of water. How many grams of cobalt (II)
An optimization from a particular starting structure of a compound C5H10O2 leads to an energy of 25.12 KJ/mol.
What is the limiting reagent? What is the theoretical yield of acetanilide? What is the percent yield if 3.3g of acetanilide is obtained?
what an alkane with molecular formula C8H18 gives a single product of monohalogenation?
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