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A student extracted the active ingredient from several analgesic over-the-counter drugs to determine the composition of each one. Based on the label he tested all the drugs to see if they contain acetaminophen (ACE), aspirin (ASP) and caffeine (CAF). However, he forgot to label which spot corresponds to which drug. Shown below is the TLC plate the student obtained from his experiment after extraction from Anacin®, Tylenol®, Vivarin® and Excedrin® and using 2% acetic acid and 98% ethyl acetate as the mobile phase.
Find delta ?E° for the reaction below if the process is carried out at a constant pressure of 1.00 atm and at 25 ?C, and ?V (the volume change) = -24.5 L. (1 L · atm = 101 J) 2 CO(g) + O2 (g) ? 2 CO2(g) ?H° = -566. kJ
Write the decayreaction for this isotope and explain your prediction in terms of N/Zratio.
If 0.100 mol of argon gas occupies 2.15 L at 725 mmHg, what is the temperature in degrees Celsius
how would each of the following change the rate of the reaction shown here? 2NO(g) + 2H2(g) > N2(g) + 2H2O(g)? a)adding NO(g). b)lowering the temperature. c)removing some H2(g) d)adding a catalyst
A mixture of gases conssists of CH4 at a partial pressure of 143 mm Hg, N2 at a partial pressure of 469 mm Hg, and O2 at a partial pressure of 563 mm Hg
The vapor pressure of pure methanol, CH3OH, at 30 C is 160. torr. How many grams of the nonvolatile solute glycerol, C3H5(OH)3, must be added to 131. g of methanol to obtain a solution with a vapor pressure of 133. torr.
for one of the solutions you make up for this weeks experiment 8.00 ml of 2.0e-3 m ironiii nitrate solution is mixed
How long will it take to deposit 0.00470 moles of gold by electrolysis of KAuCl4 (aq) using a current of 0.214 amperes? Which metal would be suitable to provide cathodic protection from corrosion for an iron bridge?
If the pH of such a phosphate-containing solution were gradually lowered by addition of HCl or some other strong acid, what three protonated phosphate species would be generated? (Specify the chemical formula and name of each.)
A bottle containing 330 of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
What are the first and second ionization energies of sodium. Compare this to the threshold energy from the photoelectric effect. What can you conclude
the 12 water of hydration are hydratedstrongly attracted to the metal ions of the crystallin alum structure. are the
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