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In which of these molecules does spin spin coupling occur? If splitting does occur, give the multiplicity of each kind of hydrogen
1) BrCH2CH2Br
2) ClCH2CH2I
3) CH3C(CH3)2CH2Br
4) ClHC=CHCl
Oxygen has three naturally occurring isotopes (o-16,o -17, and o-18). The mass and natural abundance of o -16 are 15.9949amu and 99.76% , respectively. The mass and natural abundance of o-17 are 16.9991amu and 0.038% , respectively.
from the experimental data we obtain i- directly. to obtain ksp for pbi2 we must calculate pb2 in each equilibrium
A certain molecule fluoresces at a wavelength of 400 nm with a half-life of 1.0 ns. It phosphoresces at 500 nm. If the ratio of the transition probabilities for stimulated emission for the S
If a bottle of nail polish remover contains 181 g of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL
Draw the structure of the peptide WRCFQ. Show the ionization state that would be the major form at pH 7. (Note: this question addresses your knowledge of the one or three letter codes for amino acids,
Consider the titration of 50.0 mL of 0.217 M hydrazoic acid (HN3, ka=2.6x10^-5) with 0.183 M NaOH. Calculate the pH of the solution after the addition of 29.7 mL of NaOH solution
A mixture of ammonia and oxygen is prepared by combining 0.260 L of NH3 (measured at 0.700 atm and 21°C) with 0.170 L of O2 (measured at 0.740 atm and 49°C). How many milliliters of N2 (measured at 0.740 atm and 100. °C) could be formed if the fol..
If an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87 C
The titration required 20.34 mL of 0.0491 M thiosulfate solution. Calculate the weight percent of ascorbic acid in a tablet of Vitamin C.
Reaction A has positve delta H and positve delta S, reaction B has positive delta H and negative delta S, reaction C has negative delta H and positiveS, reaction D has has negative delta H and negative delta S
The molar mass of cellulose is approximately 6.0 x 105 g/mol and the molar mass of a soluble starch is on the order of 4.0 x 103 g/mol. The monomer unit in both of these molecules has the emperical formula C6H10O5.
An object has a mass of 6.85g. when placed in a graduated cylinder containing 25.0 ml of water, the water level increased to 28.8 ml. Calculate the density of the object
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