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Potassium fluoride is extremely soluble in glacial acetic acid as well as the solutions have a number of unusual properties. In an attempt to understand them, freezing point depression were obtained by taking a solution of known molality and then diluting it several times
b/(mol/kg) -- delta T/K0.015 -- 0.1150.037 -- 0.2950.077 -- 0.4700.295 -- 1.3810.602 -- 2.67
Compute the apparent molar mass of the solute as well as suggest an interpretation
Use delta H fusion = 11.4kJ/mol and T*f = 290K
A sample of gas is heated. During the heating process, the volume of the gas increases 1.7 times. If the initial temperature of the gas is 80°C, what is the final temperature of the gas.
A reaction with the activation energy Ea= 219.00 kJ/mol, has a rate constant k = 2.400 x 101 at 565.00 Kelvin. Determine the rate constant when the temperature is changed to 861.00 Kelvin. R = 8.314 J K-1mol-1
For 2 SO2(g) + O2(g) 2 SO3(g), Kp = 3.0 104 at 700 K. In a 2.00-L vessel the equilibrium mixture contains 1.72 g of SO3 and 0.171 g of O2. How many grams of SO2 are in the vessel
When the actual pressure is 76.25 cm Hg the barometer reads 74.89 cm. What will the barometer read when the actual pressure is 73.27 cm of mercury
At standard temperature, a gas has a volume of 335 mL. The temperature is then increased to 123 degrees celcius, and the pressure is held constant. What is the new volume
Which of the following would be expected to have the lowest freezing temperature?
acetaminophen a common aspirin substitute has the formula c8h9no2. determine the number of molecules of acetaminophen
Determine the volume of 0.M baryta (Barium hydroxide is the chemical compound with the formula Ba(OH) 2 ) that is needed to neutralize 35 ml of 0.2M phosphoric acid (H 3 PO 4 ), ?
A gamma ray has a frequency of 3.5 x 1019Hz. Determine the wavelength of this radiation in nm and the energy of a photon of this radiation.
The half-life of radium-226 is 1600 years. How long will it take for the radioactivity of a sample of radium-226 to decrease from 130 mCi to 10 mCi
A graduated cylinder contains 145mL of water. A 10.0g piece of iron (density = 7.86g/cm3 ) and a 22.0g piece of lead are added.
Sodium carbonate can be made by heating sodium bicarbonate: 2NaHCO3(s) = Na2CO3(s) + CO2(gas) + H2O(gas) Given that for this reaction delta H = 135.5 KiloJoules and delta G = 33.1 KiloJoules at 25 degrees C, at what temperature will the reaction b..
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