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Explain what action must take from the following error- when you go to measure the distance traveled by the spots and solvent, you discover that you didn't mark the solvent front before it dried.
a.) Run a fresh TLC plate identical to this one
b.) Outlook the solvent front and spots under UV light
c.) Presume the solvent front is at the top of the slide and measure from there
d.) Compute the capillary index for the solvent and multiply times the time needed for the plate to develop to determine where the front is located
The percent ionization of octylamine in a .10 M aqueous solution is 6.7%. What is the pH of the solution and the Kb of octylamine?
write the expression for the equilibrium constant kc for the following chemical reaction.3clo2-aq 2clo3-aq
A 739 mL gas sample at STP is compressed to a volume of 244 mL, and the temperature is increased to 24 ?C. What is the new pressure of the gas in Pa?
the chlorine in a 0.125g sample of the compound was converted to CL and by reacting it with AgNO3, all the chlorine was recovered as the solid AgCl. The AgCl, when dried was found to weigh 0.251g. What is the empirical formula of this compound
A solution prepared by mixing 100 mL of 0.2 M glycine and 100 mL of 0.2 M Cu2+ is adjusted to a pH of 7 with NaOH. Calculate [Cu2+], [CuA+], [CuA2], [HA], and [A-] in the solution.
What's the reaction between acetanilide and water. I want to include this in my lab report regarding purification of acetanilide by recrystallization.
Calculate ground state energy, 1st excited energy level, and wavelenght of an electronic transition between the 2 lowest energy states for an electron
At a certain temperature a reaction that follow first order kinetics has a rate constant of to be equal to 2.5*10^-3 s^-1 the time in seconds required for the reaction to be 60% complete is
Under certain conditions, the substance ammonium nitrite can be broken down to form nitrogen and water. If 32.4 grams of ammonium nitrite react to form 14.2 grams of nitrogen
25 mL of 0.100 M AgNO3 are mixed with 35 mL of 0.0500 M K2CrO4. (a) Calculate the concentrations of each species at equilibrium.
How much energy is dissipated as heat, which is exchanged btwn the system and the heat-sink?C. What is the delta U for the above process?
What concentration of Benzoyl peroxide (k_d = 1.45 * 10^(-6) L/mol-s, 60 deg C) would be needed to polymerize a 1.00 M solution of styrene to a molecular weight of 2500
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