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Paradichlorobenzene, C6H4Cl2 is a component of mothballs. A solution of 2.00 g in 22.5 g of cyclohexane boils at 82.39 C . The boiling point of pure cyclohexane is 80.70 C. Calculate Kb for cyclohexane. Express the constant numerically in degrees Celsius per molal.
Where would we predict benzene to absorb if we treated the pi-electrons as particles on a ring (radius 1.39 A)? What is the % error? I'll give you a hint.
Calculate the equilibrium concentrations of NH3 and H2S if a sample of solid NH4HS is placed in a closed vessel and decomposes until equilibrium is reached
Concentrations of Components in an Equilibrium, The following equilibrium process at 686 deg. C. CO2(g) + H2(g) f/r CO(g) + H20 (g)
At what temperature will a gas be at if you allow it to expand from an original 456 mL at 65 celcius to 3.4 L?
When 5.0 g of CaCl2 was dissolved in 50ml of water in a coffee cup calorimeter, the temperature of the solution rose from 22.3 C to 30.5 C. What is the q solution in Joules and what is the q rxn in Joules?
How much helium gas would it take to ?ll a gas balloon with a volume of 1020 cm 3 when the temperature is 39.0? C and the atmospheric pressure is 724 mm Hg? Answer in units of mol.
If atoms of element Z have a mass of 0.815 , what is the identity of Z?
Calculate the heat change of the calorimeter (Qcal) for this process and report it below with the correct number of significant figures
Write the net ionic equation for the reaction. Calculate the equilibrium constant for the reaction.
Titration of the lead and zinc in this aliquot required 34.06 mL of the EDTA solution. Finally, cyanide was used to mask the copper and the zinc in a 25.00 mL aliquot. Titration of the lead required 26.68 mL of the EDTA solution. Determine the com..
A rubber balloon was inflated with helium gas and floated in the air. The next day, the balloon was somewhat smaller and no longer floated.
You prepare a buffer solution by dissolving 1.77 g each of benzoic acid, HC7H5O2, and sodium benzoate, NaC7H5O2, in 900.0 mL of water.The pH of the buffer is 4.19. How much (in grams) of the buffer (benzoic acid), would you add to the 900.0 mL of ..
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