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441.5 ml of heptane (C7H16) is mixed with 811.4 ml of octane (C8H|8) to form an ideal solution at 30°C. The densities of heptane and octane at 30°C are 0.6795 and 0.7025 g/ml respectively. At 30°C,the vapour pressure of heptane is 0.121 atm and vapour pressures of octane is o.o41atm.What is the total vapour pressure of the solution ?What is the mole fration of heptane in vapour above this solution?
What are the concentrations of the gases at equilibrium, if the initial concentration of carbon monoxide and water vapor are both equal to 0.325 M. Can you explain me what is the formula and how did you do it
suppose that the microwave radiation has a wavelength of 12.7 cm. how many photons are required to heat 200. ml of
A 2+ ion of a particular element has an atomic mass of 203 and 123 neutrons in its nucleus, a) what is the nuclear charge in this element. Why? b) what are the symbol and name of this element? How do you know?
Type the following formulas in order of increasing boiling point: RbF, Co2, CH3OH, CH3Br.
Using the following bond energies Bond Bond Energy (kJ/mol) C?C your knowledge C-H 413 O=O 495 C=O 799 O-H 467 estimate the heat of combustion for one mole of acetylene
What would be the speed of the following particles if they had the same wavelength as a photon of green light ( = 500.0 nm)? Proton (mass = 1.673 × 10-24 g) Neutron (mass = 1.675 × 10-24 g) Electron (mass = 9.109 × 10-28 g) Alpha particle (mass = ..
Common Ion Effect: The Ksp of silver iodide is 8.3 x 10^-17. What is the iodide ion concentration of a 1 L saturated solution of AgI to which .2 mole of AgNO3 is added
consider a reaction in which ferric oxide is converted to iron and gaseous oxygen. If this reaction is only 83% efficient and the ferric oxide is only 87.5% pure, what mass of ferric oxide is required to make 3 moles of iron
Consider 4 L of a buffer composed of 2 M HCN and 3 M NaCN? How many moles of strong acid could this buffer withstand?
Calculate the pH of a 2.96 M solution of 2,4,6-trimethylpyridine. The Kb of 2,4,6-trimethylpyridine is 2.7x10-7
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.700 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.89? Kb for ammonia is 1.8*10^-5. mass of NH4Cl
Plaster of Paris, CsSO4 x XH2O, is a fractional hydrate; that is, one water molecule attaches to more than one formula unit. If a 2.002-g sample has a mass of 1.878 g after hearing, find the water of crystallizatioin (X), and write the formula for..
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