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Imagine you preformed Sn2 reaction to form N-methyl benzyl ammonium bromide. The only impurity present in N-methyl benzyl ammonium bromide after the reaction is the benzyl bromide starting material. Draw a flow chart to explain the steps needed to purify the neutral N-methyl benzyl amine by extraction?
Calculate rate constant for 1. level reaction where 81% of the matters have already react after 27 seconds.
The hypothetical element, Bc, has three stable isotopes. The isotopic abundances and masses of the three isotopes are
A water sample was found to contain [Ca2+]=35 mg/L and [Mg2+]=20 mg/L. Determine the water hardness in terms of mg/L CaCO3.and state whether it has low, medium or high hardness.
Draw the structure(s) of the primary alcohols with the chemical formula C6H14O that have a chiral center
A 2+ ion of a particular element has an atomic mass of 203 and 123 neutrons in its nucleus, a) what is the nuclear charge in this element. Why? b) what are the symbol and name of this element? How do you know?
2-Ethoxy-2,3-dimethylbutane reacts with concentrated aqueous HI to form two initial organic products (A and B). Further reaction with HI produces organic product C from product B. Draw the structures of these three products.
At constant temperature and volume, 3.8?10-3 mol of helium is added to a 1.0 L sample of xenon at 0.081 atm and 325 K. What is the total pressure of the gas mixture
The masses of the unknown and the solvent (water) were determinded, and the unknown completely dissolved in the water. Just before the jacketed test tube containing the unknown solution was placed in the ice-salt water bath
Calculate the mass of KI in grams required to prepare 9.00 102 mL of a 1.00 M solution.
Draw the compound and its constitutional isomer indicate which structure has enantiomers, diastereomers or meso compounds. is the constitutional isomer chiral or achiral
The standard free energy for the neutralization of HCl with NaOH at 25 degrees Celsius is -79.9KJ/mol. Calculate the equilibrium constant for the reaction.
If 67.0 mL of 0.119 mol/L NaOH(aq) and 35.0 mL of 0.193 mol/L HA(aq) are mixed, then what is [HA] at equilibrium. Assume that HA is a weak monoprotic acid with pKa=6.23 at 25oC. Give your answer with three significant figures
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