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A typical aspirin tablet contains 500. mg of C9H8O4. What amount (moles) of C9H8O4 molecules and what number of molecules of acetylsalicylic acid are in a 500. -mg tablet?
Write the reaction of benzoic acid with propylamine. If there is no reaction
The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.8. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq).
a line in the emission spectrum of an atom occurs at a wavelength of 560 nm. what is the energy difference between the
Suppose the radius of an atom in a simple cubic unit cell is 0.27 nm. What is the edge length of the unit cell in nm.
calculate the mol O2 added in the air, using the fact that the N2 in the ?ue gas equals the N2 added in the air. Then make a carbon balance to obtain the total moles of C added.)
By titration, 23.4 mL of aqueous H2SO4 neutralized 24.8 mL of 0.0495 M LiOH solution. What was the molarity of the aqueous acid solution?
a premature infant suffers from respiratory distress syndrome. compared to a normal infant, your patient will have- increased production of lactate by anaerobic glycolysis
The specific heat capacity of the solution produced was 4.20 J/g•°C, and final temperature reached was 34.91°C. How much heat was produced by the dissolution
A reaction has a rate constant of 0.0591 sec-1, how much of the compound (in mol/L) is left after 5.03 sec, if there was 0.770 mol/L at the start
What would be the temperature change of 450ml of water that surrounds this ice cube assuming all the heat was transfered form the surrounding water.
Calculate the binding energy for Cf-253 if one atom of this nuclide has an atomic mass of 253.08417. Express your answer in units of picojoules/nucleus where 1 picojoule = 1x10-12 joule
Draw a structure for a compound that meets the following description: C4H8O with IR absorption at 3400 cm-1 and no absorption in the 1640-1680 cm-1 range
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