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Suppose that a 6.0g mixture of naphthalene(C10H8) and anthracene(C14H10) is dissolved in 300g of benzene. When the solution is cooled, it begins to freeze at a temp that is 0.70*C below the normal freezing point(5.5*C) of pure benzene. Find the number of grams of naphthalene and grams of anthracene in the original mixture.
There is an increase in temperature of 56 K. Calculate the heat lost or gained by the system in response to this change in the external temperature.
You find a reagent bottle that is labeled with "vanadium (III) nitrate hydrate" and it contains a chalky looking powder. Do you believe the label? Why or why not?
complete the balanced reaction if it will occur.state does not occur if the reaction will not take place.make sure that
If the standard silver half-reaction potential is set to .80V, calculate the potential for the zinc half-reaction. Write the net ionic equation for the reaction that occurs in this voltaic cell.
What would happen if the buret washed and rinsed properly but not conditioned with sodium hydroxide solution, prior to standardizing the sodium hydroxide solution?
What is the pH of the equivalence point of the two solutions if you then titrate these solutions separately with the NaOH solution? The Ka for acetic acid is 1.8e-5.
Balanced equations for the reaction of resorcinol in water, resorcinol in toluene, and resorcinol in hexanes. Balanced equations for the reaction of anthracene in the same three solvents.
One of the chair conformations of cis-1,3-dichlorocyclohexane is more stable than the other by 25.0 kJ/mol. Use this to estimate the energy cost of a 1,3-diaxial interaction between two chlorine atoms. Be sure to specify units.
The eamount of cadmium in a sample was determined using absorption spectroscopy as an analytical tecnique. Signals from a set of standards were measured and the resulting calibration curve was fit by a straight line with equation
If the Km of carbonic anhydrase for the above reaction is 1.8 mM, what is the catalytic efficiency of this enzyme under these conditions. The units are s-1M-1.
A flask contains 0.500 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
This energy is called the work function of that metal. What is the longest wavelength of radiation (in nm) that could cause the photoelectric effect in each of the following metals
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