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Choose the selection which correctly identifies the forces which must be overcome to convert BH3 from a liquid to a gas.
a) Only London dispersion forces must be overcome.
b) Only dipole-dipole forces must be overcome.
c) Only London dispersion and dipole-dipole forces must be overcome.
d) Only London dispersion and hydrogen-bonding forces must be overcome.
e) London dispersion, dipole-dipole, and hydrogen-bonding forces must be overcome.
If 14.70ml EDTA is required to titrate the 50ml sample, what is hardness of ground water, and molarity in ppm of CaCO3 by mass?
how many possible trisubstituted derivatives c6h3x2y can be obtained from the meta disubstituted benzene c6h4x2? (ignore directive effects of the substituents x and assume that all positions on the ring are accessible to the reagent y+).
A helium-filled balloon at sea level has a volume of 2.5 L at 0.989 atm and 33°C. If it is released and rises to an elevation at which the pressure is 0.900 atm and the temperature is 29°C, what will be the new volume of the balloon?
Rank the diffusion coefficients from least (1) to greatest (4) for the following cases. Assume the temperature is the same for all cases. 1-4 Interdiffusion C in gamma-Fe
What you observed upon the addition of NH3(aq) to magnesium chloride solution / what species are present in the test tube?and what happened when we add NH4Cl?
How does this affect the reported solubility product of borax at that temperature? Explain. Temperatures can range from 4.4 degrees C, 17.1 degrees C, 34.6 degrees C, 41.6 degrees C, and 50.6 degrees C.
A particular reactant decomposes with a half-life of 145 s when its initial concentration is 0.310 M. The same reactant decomposes with a half-life
How many millimeters of 0.0700 M EDTA are required to react with 50.0 mL of 0.0140 M Cu2+?, b) With 50.0 mL of 0.0140 M Sc3+?
describes the chemical change. what about for a solution of calcium chloride and a solution of mercury (I) nitrate
The solvolysis product of 1-bromo-2,2-dimethylbutane with ethanol initially forms the expected carbocation but does not give any of the expected 1-ethoxy-2,2-dimethylbutane. Draw the rearranged cation that will eventually lead to the product.
Explain how mass effects act to lower the carbonyl frequency, as well as how inductive and hyperconjugation effects act to raise the carbonyl frequency of aldehydes relative to ketones.
What is the freezing point of a solution made by dissolving 352g of ethylene glycol C2H6O2 on 648 g of water the freezing point of pure water is 0.0C and kf of pure water is -1.86Cm?
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