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A particular reaction has a ?Ho value of -180 kJ and ?So of -254 J/mol K at 298 K. Assuming that ?Ho and ?So hardly change with temperature, determine the temperature in K at which the spontaneity of this reaction changes.
Propose a mechanism for the acid-catalyzed synthesis of 4,5-dimethyldioxolane + water from formaldehyde
a sample of oxygen occupies 178 mL in a cylinder shown at a barometric pressure of 734 torr and 25 degrees Celcius. If the piston is pushed in and compresses the oxygen sample to 134 mL, what is the pressure (in torr) of the gas?
How many grams of Na3PO4 will be needed to produce 350ml of a solution that has a concentration of Na+ ions of 0.900.
calculate the value of Keq at 298 K for each of the following reactions
The pH of 0.325g of aspirin (Molar mass 180.2) tablet in 0.5L water is 3.03, What is the pKa for weak, monoprotic acid aspirin? do not disregard x
a couple drops of phenophalein indicator and then was titrated with 8.1mL of NaOH until it turned pink. what is the concentration of NaOH?
A certain plant material is known to contain mainly trimyristin and tripalmitin in approximately equal amounts. Tripalmitin, the structure of which you should look up in a reference source,
If I initially have a gas at a pressure of 12 atm a volume of 23 liters, and a temerature of 200k, and then I raise the temperature to 14 atm and increase the temperature to 300k, what is the new volume of the gas ?
A gaseous mixture of O2 and Kr has a density of 1.111 g/L at 420. torr and 300. K. What is the mole percent O2 in the mixture?
What is the balanced education and stoichiometric reagents needed with mole calculations of 1 sodium hydroxide pellet(0.075 to 0.095 g) and 0.24 g acetophenone and 0.11 g benzaldehyde
The Kp for the reaction is 4.3X10^-4 at 648K. Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900atm N2 and 0.500 atm H2 at 648K
Calculate the mass of nitrogen dissolved at room temperature in an 78.0 L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78.
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