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When strongly heated, magnesium sulfide formed a crystalline deposit on the walls of a sealed reaction vessel. Metallic deposits were found on the bottom of the container. What is the equation and the type of reaction?
A skyscraper in Pittsburg, built in the early 1970's, is supported by water filled columns. Potassium carbonate was added to the water to precent freezing during cold weather. If the solution is 40.0% K2CO3 by mass, what is the predicted freezing ..
Calculate the amount of heat required to completely sublime 14.0 g of solid dry ice (Co2) at its sublimation temperature
Describe and explain the possible effect on your results of the following experimental errors or variations. (a) You stopped the steam distillation after collecting 3 mL of distillate
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell- Pt(s)[H2(g, 1atm)][H+(aq, 1.0M)][A^3+(aq,?M)]Au(s)
What mass of Al2O3, in grams, can be made by reacting 4.6 g Al with excess oxygen?
what will be the equilibrium concentration of CO.
The energy levels of a Helium Ion, He+, may be calculated from the Bohr Theory using z = 2 for the atomic number, En = -1312.04 Z2/n2 or En=-5248.16/n2 (kJ mol-1) for n=1, 2,3,.... Calculate the first 4 energy levels of He+
Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane. The equilibrium constant for this reaction at 28 degrees Celsius is 2,900. Estimate the equilibrium constant at 38 degrees C.
A copper wire (density = 8.96 g/cm3) has a diameter of 0.26 mm. If a sample of this copper wire has a mass of 43 g, how long is the wire?
solution made from 6.50g of an unknown compound in 27.8g of diphenyl has a molality of .195m. Calculate the molar mass of the unknown.
Describe your operation, its different components or stages, the materials used and the type of wastes generated. What is your waste management plan and approach for protecting the environment and human health?
A 93-L sample of dry air cools from 145 degrees celicus to -22 degrees celicus while the pressure is maintained at 2.85 atm. What is the final volume?
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