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Consider the diatomic molecules H2 and Cs2. For which is the Born-Oppenheimer approximation likely to introduce less error and why?
If a reaction has Ea=+40.0 kJ/mol and is run at room temperature (298 K). At what temperature will the rate be twice the rate at room temperature
Calculate the enthalpy change in kilojoules when some KOH is added to 47.727 g of water and the temperature increases
Gravimetric analysis
Incandescent white of a fireworks display caused by a formation of P4O10,which occurs by the combustion of phosphorus, how many moles of O2 are needed to combine with .221 mol of p
How much energy is required to vaporize 48.7 g of dichloromethane (CH2Cl2) at its boiling point, if its Hvap is 31.6 kJ/mol
A solution made by dissolving 28 mg of insulin in 5.5 mL of water has an osmotic pressure of 15.5 mmHg at 25C. Calculate the molar mass of insulin.
the activation energy for the following reaction is 60. kjmol.sn2 2co3 rarr sn4 2co2by what factor how many times
Calculate the amount of energy needed in calories to heat 145 g of water from 22.3 degrees celsius to 75.0 degrees celsius. (water in j/g degree celsius = 4.184, cal/ g degree celsius = 1)
Calculate the mass, in grams for a gold sample that absorbs 225 J to change its temperature from 15 Celsius to 47 degrees celsius.
We want to know the pressure at this condition, but there is no means of measuring it since the tube is sealed. However, if the tube is cooled to -20 degrees celcius, small droplets of liquid are observed on the glass walls. What is the initial pr..
Calculate the total charge in coulombs supplied by the battery. How long in hours will it take to recharge the battery back to the original sulfuric acid concentration using a currtent of 22.4A
The energy required to dissociate the H2 molecule to H atoms is 432 KJ/mol H2. If the dissociation of an H2 molecule were accomplished by the absorption of a single photon whose energy was exactly the quantity required , that would be its wavelend..
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