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Draw the Lewis dot structures of the following compounds. In these structures, all atoms are singly bonded and the octet rule is always satisfied. Hints: The structure of a has more than one ring. The structure of b has three six membered rings that share common atoms. In d don't worry about the charge, just put 4 bonds around two of the boron atoms, 3 around the other two. The molecule contains a plane of symmetry.
a) P4b)P4O10c) S8d) [B4O5(OH)4]^2-
solution of unknown weak acid is combined with 70 ml of a .25 M strong base, and the final pH of the solution is measured to be 2.99. What is the pKa of the unknown acid?
converting liquid water to solid ice releases 1.44 kcal/mol.
What is the maximum concentration of fe3+ can a buffer solution that is .10M CH3COOH and .10M CH3COONa hold without forming any precipitate
Determine what would you use to prepare 10 ml of 0.2M CaCl 2 from the 20M stock solution and find out which solution is with pH > 7, but is not an Arrhenius base in the strict sense?
A sample of sodium hydrogen carbonate solid weighing 0.1075 g requires 49.35 mL of a hydrochloric acid solution to react completely.
Calculate the standard Gibbs energy and the equilibrium constant at 298 K and 400 K for the reaction, PbO(s) + CO(g) = Pb(s) + CO2(g).
a sunscreen preparation contains 2.50 by mass benzyl salicylate. if a tube contains 4.0 ounces of sunscreen how many
A sample of 2.50 mole N2 is originally confined to 20 L at 270 K and then undergoes adiabatic expansion against a constant pressure of 600 Torr until the volume has tripled. Calculate q, w, ?T, ?U, and ?H.
Explain how real gases differ from ideal gases. At what conditions do the variations become the biggest. At room conditions, if you know the condensation point for a series of gases, how will that allow you to predict which gases would vary most f..
78 ml of 2.5 m phosphoric acid is neutralized with 500 ml of potassium hydroxide. what is the concentration of the
All of the following are substrates or intermediates in the synthesis of phosphatidylinositol EXCEPT
Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17%, and Rb-87 with mass 86.9092 amu and a natural abundance of 27.83%.
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