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A buffer solution of a weak acid and its salt had a pH of 5.51 when the acid was 0.221 M and the anion was 0.928 M. Calculate the equilibrium dissociation constant (Ka).
The bulb of the thermometer placed at the head of a distillation apparatus should be adjacent to the condenser. Explain the effects on the temperature recorded if the thermometer were placed (a) below the exit to the condenser and (b) above the ex..
The second order rate constant for a reaction is 4.2300 x 102 M-1s-1. If the initial reagent concentration is 0.93800 mol/L, determine the time (in seconds) required for the reagent concentration to reach 0.21800 mol/L.
Calculate the energy required to keep lightbulb burning for 3 hours in each of the energy units of Joules and Kilocalories
Draw the structure of any D-ketoheptose in the open chain form, and answer the following questions (you must use either Haworth projection or chair conformation in each of the points below)
consider the following combustion reaction 2c4h10 13o2 -gt 8o2 10h20. 125 g of c4h2o react with 415g o2.a. which
The Group 5A elements can form molecules or ions with three, five or six covalent bonds. Predict the molecular structure and hybridization of the following substances: NH3, AsCl5 and PF6-. Why doesn't NF5 or NCl6- form
A student evaporated 100.0 mL of a saturated TlCl solution and found the solid TlCl she recovered weighed
Using the Maxwell-Boltzman function, calculate the fraction of Argon gas molecules with a speed of 305 m/s at 500 K.
Discuss what you would observe after elution and visualization of a TLC plate having made the following mistakes in carrying out the anaylsis.
The synthesis of imines and enamines typically occurs under mildly acidic conditions, yet the reaction that you will perform in this experiment is successful without the need of such acid. Why
For the following, use the function U= V^(a) n^(1-a) exp(bS/n) + cn 1.find dU in terms of S, V , and n where a, b, and c are constants. 2. Show explicitly that U=ST -PV +?n. 3. Show that this would not be the case if the constant c were not multip..
What is the minimum amount of hydrogen gas in grams required to completely hydrogenate 12.5 Kg of 2-butene?
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