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An acid HA has Ka = 2.28 x 10-4. The % ionisation of this acid in a 0.170 M solution of the acid in water is closet to?
You have a 50.00mL sample of .287 M alanine. What will be the pH of the solution be after it is titrated with 39.14 mL of .550 M NaOH
What mass of KBr is needed to prepare 325 mL of 0.750M? How many mL of 2.50M KBr is needed to prepare this same solution
If during the course of the reaction, the vessel is found to contain 9.75mol of C, 15.0mol of H2O, 3.10mol of CO, and 7.80mol of H2, what is the reaction quotient Q?
what measuring device would you use to measure the volume under each of the conditions described below? in some cases
Draw a Newman projection of the most stable conformation of (2R, 3S)-dibromobutane sighting down the C2-C3 bond.
Draw an oxygen consumption cruve for a suspension of isolated mitochondria when the following compounds are added in the indicated order. With the addition of each compound all of the previously added compounds remain present
Why is it important to apply the sample to the column in the smallest amount of solvent possible? what would happen if you used to much
a large cylinder of He gas,such as that used to inflate balloons,has a volume of 25.0 L at 22c and 5.6 atm. How many moles of He are in such a cylinder
Ni(s) +4CO(g) Ni(CO)4(g) Given that the standard free energies of formation of CO9g) and Ni(CO)4 are -137.3 kj/mol and -587.4 Kj/mol, respectively, calculate the equilibrium constant of the reaction at 80C. Assume that DeltaGf is temperature ind..
a solution containing 0.5000 moles of acetic acid per liter to 400.0 mL of 0.3000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77*10-5.
Calculate the final temperature when a 20.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 111 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the surroundings.
what is the free energy change (DG) when protons are pumped across the membrane from the side of the membrane with low concentration to the side with high proton concenration at body temperature (37C)? The membrane potential is 0.06. Report your a..
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