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a) Cyclohexane has a freezing point of 6.50 and a of 20.0. Explain what is the freezing point of a solution made by dissolving 0.771 of biphenyl() in 25.0 of cyclohexane? State the temperature numerically in degrees Celsius.
b) Paradichlorobenzene is a component of mothballs. A solution of 2.00 in 22.5 of cyclohexane boils at 82.39. The boiling point of pure cyclohexane is 80.70. Compute for cyclohexane. Express the constant numerically in degrees Celsius per molal.
in bombarding atomic nuclei with proton bullets why must the protons be accelerated to high energies if they are to
what mass of ammonium chloride can be added to 100 grams of water at 20 degrees celcius before the solution becomes saturated?
chemicals x and y react to form the gas xy but it takes some time for the reaction to occur. both x and y are placed in a container with a piston and you note the volume. As the reaction occurs, what happens to the volume of the container? explain..
What is the concentration of OH (in M) initially present in a 12 M NH solution? Hint: The K of NH is 1.8x10. Express your answer to two significant figures.
The density of an 40.0% w/w ethanol (C2H5OH) solution is 0.935 g/mL. What mass of ethanol does 225.0 mL of this solution contain
Compute the change in temperature for 4.50 g of CaCl2 dissolved in 90.0mL of H2O. Presume that the calorimeter absorbs no heat. (that is Ccal=0) (remember use dimensional analysis) information given CaCl2(s) = Ca 2+(aq) + 2Cl-(aq) H=-82.8 kJ/mol
Combustion analysis of toluene, a common organic solvent, gives 4.12mg of {\rm{CO}}_2 and 0.959mg of {\rm{H}}_2 {\rm{O}}. If the compound contains only carbon and hydrogen, what is its empirical formula
What is the final river temperature downstream? Assume that the density of the waste stream is 1000 kg/m3.
An elemental analysis shows that it contains 40.0 mass percent C, 6.71 mass percent H, and 53.3 mass percent Oxygen. Remember mass percent = grams. A determine the empirical formula. B. determine the molecular formula.
state how much greater the bleach should be to be considered in large excess. if the dye is 1times10-5 m how much can
soultion containing 10e-3 mol of dissolved Ag+ demonestrate that AgCl precipitate from the solution and calculate the wight og AgCl in grams that form per liter. Assume that all activities coefficients are equal to one.
Determine the calorimeter constant or eat capacity, for this calorimeter if the specific heat for water= 4.184 J/goC.
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