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One mole of CaCO3(s) is placed in an evacuated cylinder that is fitted with a frictionless piston. It is heated to 800 degrees C at which point it decomposes to CaO(s) and CO2(g). Calculate the work done assuming complete decomposition at 1.00 bar. How much work would be done if there was no piston and the container was open to the atmosphere?
Write the reactions for the preparation of the diaonuim salt for the coupling of the salt with the sodium salt of 2-napthol.
Which elements exist as molecular species in their most stable states at 25 degrees C and 1 atm? iodine, magnesium, sulfur, cesium, carbon, oxygen, phosphorus, neon
What is the pH of a buffer that results when 0.40 mol NaHCO2 is mixed with 100.0 mL of 2.00 M HCl and diluted with water to 250 mL (Ka of HCO2H=1.8*10^-4.
a piece of gold jewelry that weighs 9.35 g and has a volume of 0.654 cm3. The density of pure gold is 19.3 g/cm3 and the density of pure silver is 10.5 g/cm3.
Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
What is the structural Drawing for Cyclopentane?
an airplane is pressured to 650 mm Hg, which is the atmospheric pressure at a ski resort at 1.30 * 10^4 ft altitude. If air is 21% oxygen,
The 650 nm/590 nm intensity ratio for tetraphenylchlorin is 7, while the ratio for tetraphenyl porphyrin is .45. Predict the 650 nm/590 nm intensity ratio for a sample that contains 98% tetraphenylporhyrin and 2% tetraphenylchlorin.
What masses of sodium chloride,magnesium chloride, sodium sulfate,calcium sulfate, calcium chloride, potassium chloride, and sodium bicarbonate are needed to produce 1 L of arificial seawater
How many moles of HCL must be added to 1.50L of 1.70M KOH to obtain a pH of 2.00?
What volume of hydrogen gas is produced when 1.40 mol of carbon monoxide reacts completely according to the reaction at 0oC and 1 atm?
A feed containing 15% by weight of solids is to be concentrated to 40 % solids using a double effect backward feed evaporator. The first effect is heated by steam at 413 K.
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