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Elemental manganese and manganese dioxide, MnO2, in a state of high purity can be prepared by electrolyzing aqueous solution of Mn 2+. At which electrode (anode or cathode) does the Mn and MnO2 appear
If the emitted green light corresponds to an electron dropping from that excited state back down to the ground state, what is the energy spacing (in aJ) between the highest occupied and lowest unoccupied orbitals. The element used is Thallium.
Under standard-state conditions, what spontaneous reaction will occur in aqeuous solution among the ions
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion, the temperature of the water is 26.55 C. How much heat is evolved per gram of fuel burned?
25.0 ml of a calcium chloride solution is added to an excess of aqueous silver nitrate. the resulting precipitate has a
Water softeners remove metal ions of Ca2+ and Fe3+ by replacing them with enough Na+ ions to maintain the same number of positive charges in the solution.
How many grams of Ag can be formed from 9.50 grams of Ag2O in the equation: 2Ag2O (s) ? 4Ag (s) + O2 (g)?
A raw wastewater is to be treated chemically for the removal of total suspended solids and phosphorus through coagulation, flocculation, and sedimentation. The wastewater characteristics are as follows: Q = 0.60 m3/s Orthophosphorus = 9.0 g/m3 as ..
Determine the number of moles of oxygen that would be needed to completely combust 0.0350 moles of benzene
How much of a 10mM protein solution would you need to prepare 3 mL of a 3mM protein solution. What size micropipette would you use to measure the volume of protein calculated in part a
Graphite is a semi-metal composed of sheets of fused benzene rings. There are no bonds between sheets, only van der Waals interactions
A gas expands and does P-V work on the surroundings equal to 345 J. At the same time, it absorbs 191 J of heat from the surroundings. Calculate the change in energy of the gas.
What is the minimum mass of sulfur dioxide necessary to produce 200. grams of sulfuric acid in the reaction?
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