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Propane reacts with oxygen in the air to produce carbon dioxide and water. In a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen. What is the %yield in this reaction?
If 25.0g of sodium peroxide(Na2O2, MW = 78.0g/mol) is reacted with 12.1g of water (H2O, MW = 18.0 g/mol) according to the following thermochemical equation: What quantity of heat is released?
How can one draw a best fit straight line on a temperature versus time graph to determine the temperature at which two phases (solid plus melting point) appear
What is the energy per photon of the lowest frequency of electromagnetic radiation that can be used to observe a gold atom with a diameter of 280 picometers.
Can someone please draw the scheme of Selenium: "A sample is preserved in the field at 4oC. The sample aliquot is oxidized, in acidic persulphate
Name and list the functions of the prosthetic group(s) associated with a) HDLs , b) interferons, c) viruses , and d)hemoglobin
A foul smelling gas produced by the reaction of HCl with Na2S was collected, and 1.00 L sample was found to have a mass of 1.52 g at STP. What is the molecular mass of the gas. What is its likely formula
Five grams of the specified pure solvent is placed in a variable volume piston. What is the volume of the pure system when 50% and 75% have been evaporated at: (i) 30 deg C (ii) 50 deg C?
When a 3.03x102 g strip of zinc is dropped into a large beaker containing excess hydrochloric acid, how many grams of gas are formed?
A solution is prepared by dissolving 20.2 of methanol in 100.0 of water at 25 . The final volume of the solution is 118 . The densities of methanol and water at this temperature are 0.782 and 1.00 , respectively. For this solution, calculate each ..
Assume a specific heat of 4.18 J/(g·°C) for the solution, an initial temperature of 25.0°C, and no heat transfer between the cold pack and the environment
determine its (a) electronic geometry, (b) number of nonbonding domains on the central atom, and (c) polarity of the molecule. Remember, that molecules that have zero nonbonding domains on the central atom AND have all of the outer atoms the same ..
The Ka values for nitrous acid HNO_2 and hypochlorous HClO) acid are 4.5 10^{-4} and 3.0 10^{-8}, respectively. Which one would be more suitable for use in a solution buffered at pH = 7.0?
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