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Question - If the side chain pka of an asp residue is shifted to 4.5 microenvironment, what fraction of the residue will exist as the conjugate base at PH 5.5?
Determine How many moles each are in 1.30L of the saline solution if a physiological saline solution contains 174mEq/L each of Na+ and Cl - .
Which of the following equations represents the proper net ionic equation for the complete neutralization reaction between the strong base KOH (aq) and the weak acid HF (aq)
The atmospheric sulfur dioxide concentration over a certain region is 0.12 ppm by volume. Calculate the pH of the rainwater due to this pollutant. Assume the dissolution of SO2 does not affect its pressure.
Calculate the expected vapor pressure at 25 OC for a solution containing 158.0 g of nonelectrolyte sucrose (MW = 342.3 g/mol) in 643.5 mL of water. At 25 OC, water has a density of 0.9971 g/mL and its vapor pressure is 23.76 torr.
there are about 1200000 autos .each auto emits 3.1g no2 and 1.6g ch4 per vehicle mile. each auto travels 30 miles round
A 255-mL sample of HCl solution reacts with excess Mg to produce 14.0 L H2 gas at STP. What is the molarity of the HCl solution?
Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes particles that are then detected by a charged-particle collector. The half-life of 241Am is 432.2 years, and it decays by emitting alpha particles
If a person produces and exudes polyunsaturated oil from their skin, how does it ultimately make clothes smell bad, and how does baking soda remove the odor?
Calculate the volume of water added to 0.410 L of 0.0340 M sodium hydroxide to obtain a 0.0110 M solution (assume the volumes are additive at these low concentrations).
Calculate the molarity of 464 mL of a solution that contains 135 g of sucrose C12H22O11
An electron is con?ned to a one-dimensional box of length L. It falls from the second energy level to the ground state, and releases a photon with a wavelength of 322 nm.
Calculate (a) the volume occupied by 8.2 mmol of the gas under these conditions and (b)an approximate value of the second virial coefficient B at 300 K.
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