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The standard enthalpy of formation of n-octane is -249.95 kJ/mol. Compute the amount of heat liberated when 3.58 g of n-octane is burned completely with excess oxygen to form carbon dioxide and liquid water.
A water sample was taken from a lake. A 100.00mL portion of this sample was pipetted into a 250mL Erlenmeyer flask. EriochromeBlack T-indicator, sodium cyanide, and ammonia buffer
Suppose that a fully charged lead-acid battery contains 1.50L of 5.00M H2SO4. What will be the concentration of H2SO4 in the battery after 2.30A of current is drawn from the battery for 9.50 hours? Express the molar concentration numerically
What minimum OH- concentration must be attained (for example adding NaOH) to decrease the Mg2+ concentration in a solution of Mg(NO3)2 to less than 1.1e-10 M
A steady current was passed through molter CoSO4 until 8.85 g of metallic cobalt was produced. Calculate the number of coulombs of electricity used.
When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction CaCO3(s)?CaO(s)+CO2(g)
A compound is heated to produce gas whose molecular mass is to be determined. The gas is collected by displacing water in a water filled flask inverted in a trough of water
How much alcohol must be burned to generate enough heat to warm 279kJ from 60 degrees fahrenheit to 180 degrees fahrenheit
The rate constant for the first order decomposition of SO2Cl2 is 1.37 x 10^-3 min-1 at a certain temperature. If the concentration is initially 0.500 M, predict it after 300 min.
Calculate the molarity of a solution made by dissolving 0.650 Na2SO4 grams of in enough water to form exactly 950 mL of solution.
a water soluble salt forms a precipitant during Group 3 analysis. An acidic solution of this precipitant and NaBiO3 yields a pinkish color. This same salt has no reaction to concentrated H2SO4 or AgNO3, what is the chemical formula for this salt?
if 76g of Cr2O3 and 27 g of al completely react to form 51 g of Al2O3 how many grams of Cr are formed?
A reaction takes place with a mass defect (lost mass) of 0.030kg. How much energy does the correspond to?
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