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A 40.85 mL sample of a 0.200 M solution of barium nitrate is mixed with 11.33 mL of a 0.250 M solution of potassium sulfate. Assuming that all ionic species are completely dissociated, what is the osmotic pressure of the mixture in torr?
Compute the amount of heat evolved in the oxidation of 32.0 grams of Fe at the temperature 25 oC and pressure 1 atm pressure ( ΔHfo(Fe 2 O 3 ,s) = -824kJ/mol)
Ammonia reacts with oxygen according tot he following equation: 4NH3+5O2=4NO+6H2O deltaHrxn = -906kJ Calculate the heat (in kJ) associated with the complete reaction of 155g of NH3.
the resulting solution exerts an osmotic pressure of 829 torr. what is the molar concentration of the solution? how many moles of solute are in the solution? what is the molar mass of the solute?
Extracting aluminium uses a current of 25000 ampere.What is the time taken to produce 10kg of aluminium from Al2O3(liquid
What is the relationship between coordination number, packing, and density (as mass/volume). How do the two more efficient forms of packing compare regarding volume.
At standard temperature, a gas has a volume of 371 mL. The temperature is then increased to 131C, and the pressure is held constant. What is the new volume?
A sample of nitrogen gas is collected over water at a temperature of 23.0 degrees Celcius. What is the pressure of the nitrogen gas if atmospheric pressure is 785 mm Hg?
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.041 moles of sulfuric acid is mixed with water to make 169 mililiter of solution, what is the molarity of H+? Answer in units of M.
At 760K, 85% of a sample of cyclopropane changes to propane in 79.0min. Calculate the value of the rate constant for this reaction. All isomerization reactions are first-order.
What mass of sucrose should be combined with 488 of water to make a solution with an osmotic pressure of 8.25 at 280.
Determine the mass of CuSO4 · 5H2O that must be used to prepare 250 mL of 0.88 M CuSO4(aq).Answer in units of g.
A green leaf has surface area 2.20 cm^2. If solar radiation is 1190 W/(m^2) , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
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