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A sample of KCIO3 weighing 4.55g is strongly heated. All of the oxygen gas given off is collected over water in a flask. The atmospheric pressure is 29.06inches of mercury. The temperature is 23 degrees C. The gas constant is 0.0821 (L)(atm)(K)(mol). What is the volume of water that is expected to be displaced by the oxygen gas (in Liters)? The equation for the reaction is2KClO3->2KCl+3O2
If the mass of a rectangular slab of aluminum oxide of dimensions 2.5cm X 3.0cm X 4.0cm is 102g. Explain what is the density of the aluminum oxide
The Ksp of barium fluoride is 1.0 x 10^-6. The Ksp of calcium fluoride is 3.9 x 10^-11. What is the remaining concentration of the first ion to precipitate when the second ion begins to precipitate?
Now if your lab partner needed 7.030 x 1019 molecules of Sodium cyanide (NaCN), how many milligrams would you need to weigh out?
if you knew an electron transfer center in a protein had a reduction potential of -400 mv what would be the most likely
Hydrochloric acid reacts with calcium to form hydrogen and calcium chloride. If 100 grams of hydrochloric acid reacts with 100 grams of calcium, what is the limiting reagent
What is the resulting pH when 0.005 moles of KOH is added to 0.100 L of a buffer solution that is 0.100 M in H2PO4 - and 0.100 M HPO4 2- and the Ka2 = 6.2 x 10^-8
To prepare a fertilizer, an engineer dilutes a stock solution of sulfuric acid by adding 20.9 L of 6.50 M acid to enough water to make 500. L.
Explain what happens upon addition to a strong acid to the following equilibrium without using the Le Chatelier principle. What happens upon addition of a strong base
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
A chemist needs to determine the concentration of a solution of nitric acid, HNO_3. She puts 865 mL of the acid in a flask along with a few drops of indicator.
Describe the incident and identify the polymeric or explosive materials and discuss the chemical interactions of the material(s) involved in this incident or hazardous properties relevant to the incident.
At what temperatures is this reaction spontaneous at standard conditions. Assume that ?H° and ?S° do not depend on temperature.
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