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A flask of water is connected to a powerful vacuum pump. when the pump is turn on, the water begin to boil. after a few minutes, the same water begins to freeze. eventually, it dissapears. explain what happens at each step
A solution is prepared by dissolving 285 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
What is the dissociation constant, Kd, of a ligand with a percent occupancy (or fractional saturation) of 20% when [ligand]
If the tempurature of the combined solution rises to 27.8 degree C what is the DeltaHrxn (delta heat reaction) (in kJ/mole) for this process?
In the standardization of NaOH, 38.76 mL of NaOH was required for 0.8169 g potassium acid phthalate. Estimate the accuracy we should expect in the molarity of the NaOH solution assuming the weighing error is ±0.1 mg
A chemical reaction is found to have an activation energy (Ea = 15 kJ/mol). At a temperature of 505 K, what fraction of collisions have enough energy to exceed the activation energy
During an experiement, 225 mL of Wet H2 was collected over water at 29 Celcius, with a total pressure of 748 torr. How many grams of Zinc were consumed as a result
80 micrograms of lead were detected in 5 L of drinking water. What is the concentration of lead in molarity (M)
A gaseous fuel mixture stored at 745mmHg and 298 K contains only methane CH4 and propane C3H8. When 11.5L of this fuel mixture is burned, it produces 774kJ of heat. What is the mole fraction of methane in the mixture
Assuming that the Pauli exclusion principle remains valid in the distant universe, what is the maximum number of electrons that can populate a given orbital there.
A 4.50G sample of LiCl at 25.0 degree celcius dissolves in 25.0 mL of water also at 25.0 degree celcius. The final equilibrium temperature of the resulting solution is 60.8 degree celcius. What is the enthalpy of solution of LiCl expressed in kilo..
1.70 atm of I2 and 1.30 atm of Br2 are loaded into an evacuated container. The following reaction takes place with Kp = 117.6 Calculate the equilibrium partial pressure of bromine gas. No approximations can be made because the equilibrium constant..
vessel is filled with .202 mol of NO and .202 mol of O3 at 366K. Find the partial pressure of each produce and the total pressure in the flask at the end of the reaction.
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