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What NaCl concentration results when 214mL of an .087M NaCl solution is mixed with 517mL of a .250M NaCl solution?
A mixture of He,Ar, Xe and has a total pressure of 2.60 atm. The partial pressure of He is 0.350 atm, and the partial pressure of Ar is 0.200 atm. What is the partial pressure of Xe
Suppose 93.0 g of HI(g) is placed in a glass vessel and heated to 1107K. At this temperature, equilibrium is quickly established between HI(g) and its decomposition products, H2(g) and I2(g)
What molarity of sulfide ion will produce the greatest amount of lead sulfide (Ksp = 8.0 x 10-28) precipitate without precipitating any tin(II) sulfide(Ksp = 1.0 x 10-25)
What biochemical changes are required to convert tyrosine to (a) norepinephrine and (b) epinephrine? and 3- Some bacterial signaling systems involve kinases that transfer a phosphoryl group to a His side chain. Draw the phospho-His side chain.
a balloon filled with helium gas has a volume of 762 ml at a pressure of 1atm. the balloon is released and reaches
A graph of abs vs. time of the product of an enzyme catalyzed reaction has a slope of 0.009 sec-1. What is the velocity of the reaction if the product has a molar absorptivity of 13,000 M-1 cm-1 and a path length of 0.5 cm in a 200 µL volume
DNA Coiling and Topoisomerase, draw a circular DNA molecule that contains 3 negative supercoils. In this DNA molecule, make L = 250 and T = 253. Don't draw the details here i.e., all 250 of the strand passages around each other.
Calculate the pZn of a solution prepared by mixing 25.0 mL of 0.0100 M EDTA with 50.0 mL of 0.00500 M Zn2+. Assume that both the Zn2+ and EDTA solutions
If 29.10 mL of a 0.145 M nitric acid is required to neutralize 50.00 mL of barium hydroxide solution, what is the molar concentration of the base?
According to the Second Law of Thermodynamics, any process during which the entropy of the system increases will be product-favored.
In a study of the effect of temperature on halogen decomposition. 0.50 mol of I2 was heated in a 2.5 L vessel and the following reaction occurred. I2 (g)--> 2I (g)
Propose a mechanism for the addition of bromine and water to cyclopentene. Be sure to show how the trans product results
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