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Calculate the amount of heat released in the complete combustion of 8.17 grams of Al to form Al2O3(s) at 25 degrees Celsius and 1 atm. ΔH0f for Al2O3(s) = 1676 kJ/mol.
4Al(s) + 3O2(g) --> 2Al2O3(s)
Write a detailed, stepwise mechanism for all steps in the addition of HBr to 1-pentene in the presence of peroxide. Show all intermediates and use cuved arrows as appropraite.
Calculate the number of electrons transferred in the following reaction when it is correctly balanced. C5H8O(g) + O2(g)---> CO2(g) + H2O(l)
What is the value of the equilibrium constant at 500 K for a chemical equilibrium that as a delta H value of 250 kj/mol and a delts S value of 48 J/mol K?
Explain, why you used sulfuric acid in the experiment, not HCl. (3) Give the structures and names (including description of stereochemistry) of three alkenes produced in dehydration of 3-methyl-3-pentanol.
How many grams of 02 are consumed by the combustion of 2660g of octane(C8H18)? Balanced equation is 2C8H18 +25O2-->
What is the maximum concentration of Cd2+ that can exist in a solution in which the S2- concentration is 2.5 x 10-6? Ksp(CdS) = 8.0 x 10-27
Suppose that the atomic mass unit (amu) had been defined as one-eighth of the average mass of an atom of sodium instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of magnesium be on this new scale
Consider the following chemical equations: A) Fe2O3(l) + Al(l) ---> Fe(l) + Al2O3(s) If 25.0 g of molten iron(III) oxide reacts with 475 g of aluminum, what is the mass of the iron produced. B) Al(OH)3(s) + H2SO4(l) ---> Al2(SO4)3(aq) + H2O(l) If ..
a sculptor has prepared a mold for casting a bronze figure. the figure has a volume of 245 ml. if bronze has a density
As a technician in a large pharmaceutical research firm, you need to produce 450.ml of 1.00M potassium phosphate buffer solution of pH = 7.13. The Pka of H2PO4 - is 7.21.
How many grams of water can be cooled from 34°C to 11°C by the evaporation of 85 g of water? (The heat of vaporization of water in this temperature range is 2.4 kJ/g. The specific heat of water is 4.18 J/g-K.)
a bottle containing 300 g of cleaning solution is used for carpets. if the cleaning solution has a specific gravity of
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