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A sample of zinc nitride, Zn3N2, contains 39.0 g of zinc. How many nitride ions are present?
Determine the answer to each of the following: a) the number of unpaired electrons in the Mn2+ ion: show valence orbital diagram b) a possible set of quantum numbers (n, l, ml, ms) for an electron occupying a 5p orbital
In the preparation of esters, the reaction product was extracted with 5% of sodium bicarbonate solution in the isolation step. Why? What gas was evolved during this washing step? Write a balanced equation for the reaction that produced it.
Which of the following molecules would be expected to exhibit hydrogen bonding? a.methane b. hydrogen bromide c. ethanoic acid (acetic acid) d. hydrogen sulfide
Draw the Lewis Dot Structure for both substances b. Determine the electron pair geometry c. Determine the molecular geometry d. Compare the F - C - F bond angle to the H - S - H bond angle e
If 18.5 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia
Calculate the potential at a platinum electrode in the titration of 50.0 mL of 0.100 M FeSO4 after addition of 7.00 mL of 0.0500 M KMnO4.
The excess I3 was titrated with 50.00 mL of a 0.02000 M Na2S2O3 solution. What was the mass percent of arsenic trichloride in the original sample?
Which of the above sets of quantum numbers could possibly describe an electron in the ground-state configurations of boron
The rate law of a given reaction is rate=k[reactant]^2, with k=2.64 x 10^-4 M-1min-1. If the initial concentration is 0.0250 M, what is the initial rate?
calculate the number of grams of potassium chloride kcl that will be formed by the decomposition of 6.45 grams of
At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is established, it is found that the total pressure is 2.175..
When 26 mL of a 155 mL stock solution containing 2.1 M AlCl3 is diluted to 76 mL, what is the concentration of Cl- in the new solution
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