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Calculate the heat of combustion of ethylene, C2H4. The bond energies are: C H 416 kJ/mol; C C 356 kJ/mol; C C 598 kJ/mol; O O 498 kJ/mol; C O 803 kJ/mol; H O 467 kJ/mol.
(0.0250 moles)(5 moles of the H20 / 1 mole of copper sulfate pentahydrate)(18.01 g/mol of H2O) = 2.25 grams, on top, in order to achieve the real molarity of CuSO4 when in solution?
One a cold day a person takes a breath of 450 ml of air at a pressure of 745 mm Hg and room temperature of 21oC. What is the volume of this air in the lungs at 37oC and 758 mm Hg?
A gas sample occupies a volume of 20cm^3 at 40 degree Celsius and at a pressure of 1.60atm. What volume will it occupy at STP?
Determine the average atomic mass of helium, which has two isotopes having atomic masses 4.0026 amu and 3.0160 amu.The relative abundance of the two isotopes is 99.9999 percent and 0.0001 percent, respectively.
Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 75 meters and a wind-conversion efficiency of 25 percent.
Please explain, in deatail, how you would go about experimentaly determining the mechanism of the following reaction
Given the following balanced reaction, if a mixture of 1.50 mol of Al and 3.00 mol of Cl2 are allowed to react, how many moles of AlCl3 are formed, assuming a 75% yield?
decomposition of N2O5 to NO2 and O2 at 70 degree celsius is 6.82 x 10^-3 s-1. Suppose we start with 0.300 mol of N2O5(g) in a .500L container. How many minutes will it take for the quantity of N2O5 to drop to .030 moles?
Calculate the moles of N2 that will be in 224 L at STP and the partial pressure of O2 in Pa for air at 2.50 atm pressure
the electrolysis of molten a12o3 at 980 ordmc is used to produce metallic aluminum. a current of 360 a is used in the
Give the structure of the products that you would expect from the reaction of 1-butyne with each of the following: a) 1 mol equivalent of BR2 b) 1 mole equivalent of HBr c) H2 in excess/Pt, then 3 mol equivalent of NaNH2 and then CH3I d) NaNH2 the..
calculate the specific heat of a metallic element if 478 j of energy are needed to raise the temp. of a 82.73 g sample
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