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Saturated water vapor at 200C is isothermally condensed to a saturated liquid in a piston-cylinder device. Calculate the work done during this process, in kJ/kg.
A voltaic cell is constructed that uses the following reaction and operates at 298 K.
Write an equation to represent the dissociation of Na2SO4 into ions in an aqueous solution. 5.3 grams of Na2SO4 are dissolved and diluted up to 350 ml.
When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in solution?
The molar heat capacity of a gas at constant pressure is 18.7J mol-1 K-1. What is the heat capacity of 9.4 moles of this gas at constant volume?
If 1.00 moles of H2 and 2.00 moles of I2 are introduced into a 3.00 L flask at 500 degrees Celsius, how many moles of HI are present at equilibrium?
A 1.5 gram sample of a gaseous hydrocarbon has a volume of 820 ml when measured at 227 degrees Celcius and 2.50 atm. Which of the following is the formulas for the gas?
Question: 3 grams of propane burns and warms 100 grams of water from 20 degrees Celsius to 100 degrees Celsius. What is the delta H of combustion of the propane. What is the sign (positive or negati
Calculate the final temperature of the mixture. Assume that no energy in the form of heat is transferred to the environment. (Heat of fusion = 333 J/g; c ice = 2.06 J/g·K, c water = 4.184 J/g
The freezing-point depression of a 0.100 m (molality) MgSO4 solution is 0.225 degrees Celsius. Determine the experimental van't Hoff factor of MgSO4 at this concentration.
It takes 46.0 J to raise the temperature of an 12.5g piece of unknown substance from 13.0 oC to 26.2 oC. What is the specific heat for the substance?
At 20°C only 0.24 g of an organic acid "A" dissolves in 100. mL of water, but 2.70 g of the same acid dissolves in 100. mL of ether. Calculate the value of the partition coefficient.
When 1.00 gram of reserpine is dissolved in 25.0 grams of camphor, the freezing point depression is 26.3 degrees C. Calculate the molality of the solution and the molar mass of reserpentine.
What is the mass of hydrogen gas released from 2.70 g of aluminum metal and hydrochloric acid?
Calculate the amount of Tris (hydroxlmethyl) aminomethane (Tris) necessary to make 100mL of a 0.100M Tris buffer that is equimolar in Tris-base(MW=121.1 g/mol) and Tris-HCl(MW=157.6g/mol).
Explain how can you determine whether one of these two suspected compounds was identical to the unknown compound without using any for of spectroscopy.
0.25 mols of an unknown acid is dissolved in enough water to make 1 Liter of solution. The pH of the solution is 2.19. Determine the ka of the acid from this data.
The density of the waste is 85.3 Ibm/ft3. Calculate the weight of the pond contents in Ibf using a single dimensional equation for your calculation.
Lindane is a toxic insecticide that causes dizziness and diarrhea in humans. Find the molecular formula for lindane given its percent composition: 24.78% C, 2.08% H, and 73.14% Cl. The approximate m
Explain what was surprising about the observations and important conslusions derived from blackbody radiation, the photoelectric effect, and the hydrogen spectrum.
10.0 moles of NH3 and 10.0 moles of H2 are introduced into a 2.00 L flask. At equilibrium, 3.0 moles of NH3 gas remain. Calculate Kc for this reaction.
The work function of a certain metal is 1.3*10^-18 J. Upon irradation with light of a given wavelength, electrons are ejected from the metal with a velocity of 3*10^6 m/s. what is the wavelength of
The taste of sour milk is lactic acid. What is the molecular formula for lactic acid if the percent composition is 40.00% of C, 6.71% of H, 53.29% of O and the approximate molar mass is 90 g/mol
Describe how to prepare 2.0 liters of a .20 M NaOH solution from 50%. (w/w) Naoh solution that has a density of 1.53 g/mL, and doing all measurements by volume, not mass.
A reaction happens at two different temperatures. At the higher temperature the reaction takes 25 seconds, and at the lower temperature the reaction takes 125 seconds. What is the relationship betw