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When elements in the d-block are ionized, the electrons enter the nd orbitals before they enter the (n+1)s orbitals. Explain why this is so.
A procedure called coulogravimetric analysis combines a weight determination with a measurement of the quantity of electricity in a controlled-potential electrolysis to analyze bromide-chloride mixtures
determine the final value of n in a hydrogen atom transmition if the electron starts in n2 and the atom absorbs a
The rare earth metal terbium is produced from terbium (III) flouride and calcium metal by a single replacement reaction. Given 27.5 g of terbium (III) flouride and 6.96 g of calcium, what is the theoretical yield (in grams) of terbium
What is the minimum flow rate of water (? = 0.990 g/mL) required to scrub out 90.0% of the incoming NH3? What is the mole fraction of NH3 in the scrubbed waste gas stream?
Explain how the sponge nucleoside cytosine arabinoside and fungal nucleoside cordycepin combat cancer (give their structures as well).
Calculate the heat of combustion of napathalien on a molar basis. Find the molar heat of comb.: q/1 mol. of napthalien
Calculate the concentration of FeSCN^2+ after 25 mL of 0.002 M Iron nitrate Fe(NO3)3 is combined with 15.0 mL of 0.200 M
What absorbance would be obtained for a solution that has an absorptivity of 4700 L/mol*cm for a 1.5x10^-4 solution in a 1.0 cm cell? What would the percent transmittance (100*I/Io) be
In the work-up procedure the reaction mixture is neutralized with NaOH (aq) and then extracted twice with diethyl ether. Explain why this is done. This was for an OChem Menthone lab.
While carbohydrates are composed mainly of the same atoms, the structural arrangement differs considerably with related performance. Please indicate the linkages, if any, that exist within the following carbohydrates
is submerged in 7.81g of water at 52.5 degrees C in an insulated container. what is the final temperature of both substances at thermal equilibrium.
The Ka of lactic acid, HC3H5O3, is 1.410?4. (a) Suppose buffer #1 is prepared using 40.0 mL 0.1 M HC3H5O3 and 60.0 mL 0.1 M C3H5O3- to give a final volume of 100.0 mL. What is the pH of this buffer
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