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The enthalpy of formation is carbon monoxide is difficult to determine experimentally because it is difficult to burn carbon without producing carbon dioxide as well as carbon monoxide. However, the heat released by burning CO to form CO2 can easily be measured. ?Hf° for CO2 is -94.05 kcal and ?HR° is -67.64 for the reaction CO + 1/2 O2 -> CO2. What is the enthalpy of formation of CO?
A gaseous mixture of O2 and Kr has a density of 1.192 g/L at 305 torr and 300. K. What is the mole percent O2 in the mixture
How many moles of oxygen molecules would be needed to react with 111.2 grams of iron? How many grams of rust would result from this reaction
A sample of helium gas has a volume of 241 mL at 0.83 atm. What pressure is needed to reduce the volume at constant temperature to 35 mL.
The first steps in the radioactive decay of 257Uuh involves the rapid and successive emission of 4 alpha particles.
Octane is a liquid component of gasoline. Given the following vapor pressures of octane at various temperatures,estimate the boiling point of octane in Leadville, Colorado, where the atmospheric pressure is 496 mmHg.
The gas in a piston (defined as the system) is warmed and absorbs 670 J of heat. The expansion performs 347 J of work on the surroundings. What is the Change in internal energy for the system?
Write balanced reactions for the complete combustion of each fuel and use standerd enthalpies of formation to calculate the amount of heat relesed per kilogram pf the fuel.
Identify the acid and base on the left side of following equations and identify their conjugate species on the right side. (Type your answer using the format (NH4)2CO3 for (NH4)2CO3, [NH4]+ for NH4+, and [Ni(CN)4]2- for Ni(CN)42-.)
A solution is prepared by dissolving 27.1 g urea, (NH2)2CO, in 171.2 g water. Calculate the boiling point of the solution. Urea is a nonelectrolyte.
the absorbance of the solution was found to be .5528. Based on the calibration curve of Y=26.1x + .081 (where absorbance is on y axis and concentration of product C is on the x axis) determine the equilibrium concentration of C, then using an ICE ..
What is the density of a rock that weighs 10 grams and displaces water in a graduated cylinder from 100 to 120 mL.
What is the volume of the air space when the bell has been lowered to a depth of 50m? Take the density of sea water to be 1.025gcm^-3 and assume that the temperature is the same as on the surface
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