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Calculate how much 95% ethyl alcohol will be required to dissolve0.1g of sulfanilamide at 78 degrees celsius and Using the volume calculated in the previous question,calculate how much sulfanilamide will remain dissolved in the mother liquor after the mixture is cooled to 0 degrees celsius.
A 1.0 ounce piece of chocolate contains 15mg of caffeine, and a 6.0 ounce cup of regular coffee contains 105mg of caffeine. How much chocolate would you have to consume to get as much caffeine as you would from 2.0 cups of coffee.
A solution contains 3.60 mol of water and 1.50 mol of nonvolatile glucose (C6H12O6). What is the mole fraction of water in this solution?
Determine how much oxygen in grams is formed by the complete reaction of 38.88 of Na2O2.
Calculate the CO3- concentration of a 5.45 x 10-4 M H2CO3 (carbonic acid) solution. Ka1 and Ka2 of carbonic acid are 4.3 x 10-7 and 4.8 x 10-11 respectively.
Estimate the temperature where Keq = 1.00 for the reaction. Estimate the value of deltaS0 for this reaction.
At 30 degrees Celsius, the titration of a 5.0 mL sample of succinic acid required 29.56 ml of .950M NaOH. Find the concentration of succinic acid in moles/liter
When the pH of a solution is 2 units lower than the pKa of the buffer in the solution, the conjugate base/weak acid (A-/HA) is Enter a number only (no scientific notation please).
The activation energy of the orginal pathway is 106 KJ/mol. What is the activation energy of the new pathway, all other factors being equal?
What volumes of the stock solution will you have to pipet into the flasks to prepare standards of 1.00, 2.00, 5.00 and 10 x 10 -3 M KMnO4 solutions?
How can you tell when looking at organic compounds what is saturated? Here are some examples?
when 10.0g of water at 100.0 oc isadded to 100.0g of water at 10.0ocin a calorimeter the final temperature is 18.0oc.
What is the pKb for the acetylsalicylate (C9H7O4-) ion in a 0.10 M solution of sodium acetylsalicylate (NaC9H7O4). A. 3.52 B. 10.48 C. 3.0 x 10-4 D. 3.0 x 10-11 E. 8.26
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