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The oxidation of copper 1 oxide, Cu2O (s) to copper 2 oxide, CuO (s) is an exothermic process:
2Cu2O (s) + O2 (g) -> 4CuO (s) deltaH= -292.0 kJ x mol-1
Calculate the energy released as heat when 25.0 grams of Cu2O (s) undergo oxidation at constant pressure.
A solid mixture consists of 35.7 of KNO3 (potassium nitrate) and 6.3g of K2SO4 (potassium sulfate). The mixture is added to 130. of water. If the solution described in the introduction is cooled to 0
Write a balanced equation for the following reaction: an aluminum-carbon compound that is 74.97% aluminum by mass reacts with water to produce aluminum hydroxide and a hydrocarbon that is 74.87% carbon by mass
A piston has an external pressure of 14.0 . How much work has been done if the cylinder goes from a volume of 0.180 liters to 0.650 liters.
What is the label for the orbital shown here that indicates the type of orbital and its orientation in space
The catalytic converter on your automobile contains small amounts of a precious metal catalyst. Which of the following components would you expect to be decreased in your tailpipe emissions.
An element has a half life of I month. Given 1000 radioactive atoms, how many radioactive elements will remain after 3 months?
The boiling point of water at sea level Is 1000C. At higher altitudes, the boiling point of water will be a) lower, because temperatures are lower b) lower, because the atmospheric pressure is lower c) higher, because the altitude is greater.
if 50L of Argon and Helium are mixed at STP then What is the ratio of molecules of Argon to molecules of Helium in the gaseous mixture?
A student determined the calorimeter constant of the calorimeter. The student added 50.00 ml of cold water to 50.00 ml of heated distilled water in a Styrofoam cup the initial temperature pf the cold water was 21.00 degrees Celsius
An organic acid has a molecular weight of 192. A 100 mg sample of this acid was burned in an excess of oxygen in the apparatus. The only compounds that make up this acid are carbon, hydrogen and oxygen.
At 123?C, the pressure of a sample of nitrogen is 1.45 atm. What will the pressure be at 267?C, assuming constant volume?
in an experiment 1.65g of leadii nitrate react with .327g of zinc. what is the mole relationship between the lead
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