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The drug zalcitabine (also known as ddC) is a weak base with the following molecular structure. It has a pKb of 9.8. What is the percentage of the base is protonated in aqueous solution and contains 565mg/mL?
The reaction that occurs in a Breathalyzer, a device used to determine the alcohol level in a person's bloodstream, is given below. If the rate of appearance of Cr2(SO4)3 is 1.64 mol/min at a particular moment, what is the rate of disappearance of..
Calculate the mass of nitrogen dissolved at room temperature in an 80.0 {rm L} home aquarium. Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
To titrate a 5.00 mL sample of a saturated aqueous solution of sodium oxalate, it requires 25.31 mL of 0.02233 M potassium permanganate. How many grams of sodium oxalate would be present in 250.0 mL of the saturated solution
Provide simple instructions for preparing 1.00 L of a solution having pH = 7.00 at 298 K. Your instructions should include the volumes of the solutions required. (1b) What is the buffer capacity of the resulting solution.
Identify the element or elements that undergo
what is the formal charge on each of the atoms in a molecule of fluorous acid hofo? list the formal charges in the same
How many moles of chloride ions are there?
The gas was obtained by boiling liquid nitrogen stored in a 180.0 L tank. What volume of N2 is released at 0.955 atm of pressure and 25 degree celsius from a tank full of liquid N2 (d=0.808 g.mL)?
consider the reaction ag bb lt-gt cgfor which k130. assume that .406 mol of cg is placed in a cylinder that has a
Calcium nitrate will react with ammonium chloride at slightly elevated temperatures, as represented in the equation Ca(NO3)2(s) + 2NH4Cl(s) ? 2N2O(g) + CaCl2(s) + 4H2O(g). What is the maximum volume of N2O at STP that could be produced using a 2.4..
Find the confidence limit (95% confidence level), true value (from literature), absolute error, and relative error).
Using pH-based arguments only, why do scientists use phosphate-based bufers instead of buffers made using acetic acid
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