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Presume that a membrane channel obeys the concerted allosteric model with Hill coefficient 2.5. In the presence of 12 μM ligand the ratio of opened to closed channels is 0.2. Explain what is the fraction of opened channels in the presence of 0.1 mM ligand?
because the electronegative chlorine atom pulls electrons away from the O-H bond and thus weakens it. Calculate the hydronium-ion concentration and the pH of a 0.0022 M solution of chloroacetic acid. Ka is 1.3 10-3.
a 75.0 l steel tank at 20.0c contains acetylene gas c2h2 at a pressure of 1.39 atm. assuming ideal gas behavior how
calculate the heat change at 100 degrees Celsius and indicate whether heat was absorbed or released: a) joules to condense 10.0 g of steam; b) kilojoules to condense 76.0 g of steam; c) joules to vaporize 44.0 g of water; d) kilojoules to vaporize..
Write the complete mechanism for the formation of Nylon-6,10 using sebacoyl chloride as one of the starting materials. You only have to show the formation of one amide bond
A solution containing 27.05 mg of an unknown protein per 22.0 mL solution was found to have an osmotic pressure of 3.10 torr at 12 C. What is the molar mass of the protein
A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.925 g/L at 690 torr and 110 C.
Codeine, C18H21NO3, a commonly prescribed painkiller, is a weak base. A saturated aqueous solution contains 1.00 g codeine in 120 mL of solution and has a pH = 9.8. What is the Kb of codeine?
The standard voltage of the cell Ag(s) | AgBr(s) | Br (aq) || Ag +(aq) | Ag(s) is +0.73 V at 25 ?C. Calculate the Ksp for AgBr.
What would be the partial pressure of F2 is the balloon is under 3atm of pressure? e) Pretend that the HCl of this reaction is used in the neutralization of 45mL of a solution of Ga(OH) 3. What was the molarity of the Ga(OH)3 solution
1. a coordination compound is formed from rutheniumii chlorideand ammonia. what is the correct formula for this
The glass floor of the CN Tower's observation deck can withstand a pressure of 14,000 kPa. How many pounds per square inch would this be?
A bottle of wine consists of an 11 weight percent solution of ethanol (C2H5OH) in water. If the bottle of wine is chilled to -20oC, will the solution begin to freeze? Kfp for water is 01.86 oC?m-1
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