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The oxidation of copper(I) oxide, Cu2O(s), to copper(II) oxide, CuO(s), is an exothermic process,
2Cu2O+O2=4CuO
DeltaH=292.0
Calculate the energy released as heat when 26.83 g of Cu2O(s) undergo oxidation at constant pressure.
When a dilute solution of a weak base (Ka- 3.5*10^-9) is titrated with a 0.100 M solution of HCl at 25 C, the equilibrium constant for the titration reaction has this value:
The amount of heat needed to raise the temperature of 25 g of a substance by 15°C is 915 J. What is the specific heat of the substance?
A chemist has 4 moles of C2H6 to use in the study. How many moles of O2 will be needed in order to react all of the C2H6?
Compute the molarity of the hydroxide ions (OH- )in a solution that has been made by adding 70.3 grams of barium hydroxide (Ba(OH)2) in H2O(water) and diluting the solution to a final volume of four litres.
Give the balanced thermochemical equation for the following reactions. show the correct physical state in each equation.
Calculate the wavelength of light that would be required to excite an electron from the HOMO to the LUMO. Hint: Recall that (triangle)E=hv=hc/lambda, and that 1 eV=1.602 x 10^-19 Joules.
A piston has an external pressure of 6.00 atm. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.580 liters.
Give an acceptable name and identify the functional group; and
A mixture of ammonium chloride and sand is placed in an evaporating dish and massed at 56.246g. The mixture is heated, driving off the ammonium chloride and massed again
Calculate the freezing point of a solution containing 5.0 grams of KCl and 550.0 grams of water. The molal-freezing-point-depression constant for water is .86 °C/m.
Make the compounds listed from an alkyl halide having four carbons or less, with no functional groups but it can be branched, or cyclohexane, cyclopentane, or ehylene oxide.
Desribing molecular forces of C5H6O, CH2=CH-CH=CH-CH=O, THREE double bonds. We are asked to describe the bond and angle terms of this structure.
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