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A particular reactant decomposes with a half-life of 133 s when its initial concentration is 0.271 M. The same reactant decomposes with a half-life of 219 s when its initial concentration is 0.165 M.
Describe the expected results of the following tests or reagents on the sphingolipid N-palmitoyl-D-sphingomyelin
If 0.20g of gas occupies 400 mL at 30 degrees celsius and 700 mm Hg of pressure, what is the molar mass of the gas?
At 27°C, a sample of sulfur dioxide (SO2) has a volume of 30.0 mL.
Calculate the molarity of sodium ions in a solution made by diluting 50.0 mL of 0.874 M sodium sulfide solution to a total volume of 250.0 mL
What is the final concentration of a solution made from 7.8 mL of 0.92 M CuSO4 and 14.5 mL of water?
Draw a titration curve for both of these peptides. Be sure to label the axes properly, indicate the pKa values, the equivalence points and the buffering regions.
What is the maximum concentration of Cd2+ that can exist in a solution in which the S2- concentration is 2.5 x 10-6? Ksp(CdS) = 8.0 x 10-27
an aqueous solution is prepared by diluting 3.30mL acetone, CH3COH3, (d= 0.789g/mL) with water to a final volumeof 75.0 mL. The density of the solution is 0.993 g/mL. what are the molarity and the molality of acetone in this solution?
Derive an expression for the change in temperature which occurs during adiabatic expansion and calculate the work done on a closed system
Define the normal boiling point of a liquid. Explain why atmospheric pressure affects boiling points of liquids.
Suppose a solution contains 0.25 M Pb2 and 0.49 M Al3 . Calculate the pH range that would allow Al(OH)3 to precipitate but not Pb(OH)2
Why is the same volume of thiosulfate used in each reaction? What is the purpose of the thiosulfate? [You must explain the technical reasons for including the thiosulfate
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