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A catalyst decreases the activation energy of a particular exothermic reaction by 29 kJ/mol, to 28 kJ/mol. Assuming that the mechanism has only one step, and that the products are 35 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions.
What is the activation energy for the uncatalyzed reverse reaction?
For methanol, CH3OH, the molar enthalpy of fusion is 3.16 kJ/mol at the melting point T=175.2 K. Calculate the freezing point depression constant,k, of methanol
A single crystal of a metal is oriented for a tensile test such that its slip plane normal makes an angle of 65.5° with the tensile axis. Three possible slip directions make angles of 30°, 48°, and 78° with the same tensile axis.
The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 256 to 297 oC.
what volume of dry H2 gas would theoretically be produced if it is measured at 20 degrees Celcius and 785 mmHg?
Determine the molar mass of aspartame and How many moles of molecules are in 10.0g of aspartame?
The molar mass of the compound is 303.8 g/mol and the molar masses of C, O, and Ag are 12.-1 g/mol, 16.00 g/mol, and 107.9 g/mol, respectively. Determine the empirical and molecular formula of the compound.
Peonin is a red pigment found in the petals of peony flowers. Why do you think peonin is bonded to two hexoses? What monosaccharide(s) would be produced by acid-catalyzed hydrolysis of peonin?
You need to make a 500 mL buffer containing 35 mM NaCl and 50 mM Tris buffer. You already have a 5 M NaCl stock solution and a 1 M
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O
A particular calorimeter is calibrated and is found to have a calorimeter constant, Ccal = 3.640 kJ/°C. When 1.500 g of an unknown hydrocarbon was combusted in the calorimeter
Consider the gas-phase reaction A + 2B 2C + D. Starting with 1.0 mole of A and 1.0 mole of B in 2.0 liter container, the reaction proceeds to equilibrium at T = 103C with 8.6 × 10-2 moles of C now present.
A growth factor for cells was identified from extracts of rat brain. Preliminary characterization was done on this activity using several methods.
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