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A solution is prepared by mixing 54.0mL toluene (C6H5CH3, d = 0.867 g/cm3) with 280mL benzene (C6H6, d = 0.874 g/cm3). Presume that the volumes add on mixing compute the mass percent, mole fraction, molality and molarity of the toluene.
several grams of an unknown liquid were added to a 156 ml dumas bulb at 22 c and 740 torr. the open bulb was then
When 5.454 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 17.11 grams of CO2 and 7.006 grams of H2O were produced.
a solution of .85g of a unknown organic compound in 100g ofbenzene has a freezing point of -5.16c. what is the molality
During a strenuous workout, an athlete generates 2200.0 kJ of heat energy. What mass of water would have to evaporate from the athlete's
What is the pH of pure water at 40 degrees C if the Kw at this temperature is 2.92 x 10 to the -14th
How many grams of potassium lactate (KC3H5O3) must be added to 114.0 ml of 0.5 M lactic acid in order to prepare a buffer solution at pH 3.1? The pKa of lactic acid is 3.8.
Name an element in the fourth period of the periodic table with a total of 4 4p electrons. Name an element in the fourth period of the periodic table with a total of 3 3d electrons Name an element in the fourth period of the periodic table with a ..
change in enthalpy at 25 C and 1 atm for the reaction of 5.00 mol of elemental iron with excess oxygen gas?
What is the minimum amount of Tc-99 that must be shipped in order for the lab to receive 10.0 mg? Show you working please
Calculate the molarity of a solution made by adding 23.9 mL of concentrated potassium hydroxide (34.5 % by mass, density 1.46 g/mL) to some water in a volumetric flask
How would the absorbance of a NaSCN have been affected if .30 M Fe(NO3)3 had been used in place of .20 M. (In the case that the reaction has been completely driven to FeSCN2+
the water couplingdioxygen evolving reactionpromoted by photosynthetic organisms involves the proton-coupled four
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