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Benzene is an organic liquid that freezes at 5.5 degrees celsius. how much heat is evolved when 25.5g of benzene freezes at 5.5 degrees celcius? (the molar heat of fusion is 9.94kJ/mol and the molar mass of benzene = 78.0g/mol)
Calculate the [NH3] and [H4Cl] in the buffer solution. Calculate the pH of the buffer solution.
what is the final temperature once thermal equilibrium is reached. c) how much ice remains once thermal equilibrium is reached.
What is the percent ionization of a 1.3 M weak acid if the pH is 4.6. The pH of a 0.200 M solution of formic acid, HCOOH, is 2.38. What is the Ka for this acid
Examination of the product mixture revealed that only about half of the starting material had been consumed and practically no PhCOCHBrCH3 was present. Explain these observations and draw the product that did form in the reaction.
What is the molarity of H2C4H4O6 if 31.75 mL of 0.1749 M KOH are required to react with 10.04 mL of H2C4H4O6 solution according to the reaction below
You may want to write out the reaction)When ethane (C2H6) reacts with chlorine (Cl2) the product is C2H5Cl and HCl. In a certain experiment 165 g of C2H6 reacts with 255 g of Cl2.
the freezing point of t-butanol is 25.50degc and kf is 9.1degc middot kgmol. usually t-butanol absorbs water on
The air in a laboratory was measured with a barometer to be 7.40 x 100 to the 2 power mm Hg. What is the laboratory air pressure in atm?
The BaSo4 was found to have a mass of 11.96 mg. The molecular weight of the compound was found to be 168 g/mol. Using this data, what is the molecular formula of the C, H, S compound?
The pentapeptide leucylglycylthreonyltyrosylalanine is first incubated with l-fluoro-2,4-dinitrobenzene (FDNB). When the resulting compound is heated to 110oC for 24 h in the presence of 6 M HCl, the solution will contain
A certain weak base, which we will represent by the symbol B, has a basicity constant Kb = 3.7 x 10^-4 at 25 *C. The pH of a solution in which [B] = [BH^+] is
Acetone, C3H6O, and ethyl acetate, C4H8O2, are organic liquids often used as solvents. At 30 degrees C, the vapor pressure of acetone is 285 mmHg and the vapor pressure of ethyl acetate is 118 mmHg.
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