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1.) When 1.550 g of liquid hexane (C6H14) undergoes combustion in a bomb calorimeter, the temperature rises from 25.87 ºC to 38.13 ºC. Find ?E rxn for the reaction in kJ/mol hexane. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.73 kJ/ºC.
2.) The combustion of toluene has a ?E rxn of -3.91 × 103 kJ/mol. When 1.55 g of toluene (C7H8) undergoes combustion in a bomb calorimeter, the temperature rises from 23.12 ºC to 37.57 ºC. Find the heat capacity of the bomb calorimeter.
The vapor pressure of dichloromethane at 0C is 134mmHg. The normal boiling point of dichloromethane is 40C. Calculate its molar heat of vaporization.
At 0.0oC, if the volume of air is 2.5 mL and the pressure of the atmosphere that day is 835 mmHg, what is the number of moles of air?
When the protien is treated with cyanogen bromide, four peptides are obtained. When treated with trypsin, 15 peptides are obtained. What do these results suggest regarding the sequence of the protien? Please be as specific and detailed as possible..
What is the de Broglie wavelength (in meters) of a mosquito weighing 1.50 mg and flying at 1.34 m/s?
Write equilibrium reaction for HNO 2 and compute equilibrium concentrations of all species, compute pH , OH - , and the pOH
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.052 moles of sulfuric acid is mixed with water to make 179 mililiter of solution, what is the molarity of H+?
A solution is prepared by adding 0.500 g of solid NaCl to 50.0 mL of 0.100 M {CaCl_2}. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
What is the chemical balance equation and what causes the color and precipitation?
Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of water use the density of water = 1.0 g/mL.
Draw the final step of the mechanism and predict the major product obtained in the dehydration of 2
design a molecule with three chiral centers and draw eight possible stereoisomers of the molecule.
Classify the solid state of the following substances as ionic crystals, covalent crystals, molecular crystals or metallic crystals: (a) CO2 (b) B12 (c) S8 (d) KBr (e) Mg (f) SiO2 (g) LiCl (h) Cr
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