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consider the molecule H2CO using valence bond theory describe the location of the carbon electrons. the answer is 3 unpaired electrons in sp2 orbitals and one unpaired electron in a 2p orbital
A mixture of copper(II) sulfate pentahydrate (249.70 g/mol) and magnesium sulfate heptahydrate (246.49 g/mol) is heated until all the water is lost. The weight of the initial mixture is 5.020 g, and the weight of the resulting anydrous compounds i..
if adding 62.0 calories to an aluminum block causes the temperature of the aluminum to increase from 62*F to 89*F, what is the mass in grams of the aluminum block
Determine how many grams of Phosphorus tri-fluoride will be produced when 40.1 g of F2 mix, and the reaction has a 78.1% yield?
what would be the chemical equation to this problem? In an investigation of the reaction between copper(II) ions, Cu2+, and hydrazine, N2H4, in alkaline conditions the following observations were made: 25 mL of a solution containing 25 g/L CuSO4.5..
Propose a mechanism for the acid-catalyzed synthesis of 4,5-dimethyldioxolane + water from formaldehyde
the route you would use to go from starting material product to the end.
A 15.0 L flask contains 2.00 moles of N2 and 6.00 moles of H2 at 728 oC. A. Before any reaction takes place, what is the partial pressure of N2 in the flask?
The oxidation of 748g of ammonium with 740g of Oxygen produces water and nitrogenoxide. Draw a chemical spread sheet to show what happens during a chemical reaction.
Magnesium oxide decomposes into magnesium and oxygen. If 12.09g of magnesium oxide decomposes to form 7.29g of magnesium, what mass of oxygen gas is also released in the reaction?
The next 6 questions involve the calculation of concentrations of the molecular and ionic species in an aqueous solution that has an analytical composition of 0.260 M KH2PO4 + 0.160 M K2HPO4.
The diameter of a neutral helium atom is about 168 pm. Suppose we could line up helium atoms side by side in contact with one anohter. Approximately how many atoms would it take to make the distance 1 cm from end to end.
energy to heat a certain sample of pure silver from 12.0 C to 18.2 C. Calculate the mass of the sample of silver.
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