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Calculate the mass of aluminum deposited on the purified aluminum metal by the application of a current of 1.225 kiloamperes for 30 minutes from a very large quantity of a solution containing Al3+ ion in the Al2O3/Na3AlF6 molten state. Assume that you're in the aluminum refining business and have thus constructed the appropriate electrochemical cell and have applied a potential suitable to reduce aluminum, but not high enough to cause any other reductions or oxidations from the molten mixture
According to the activity series, which of these metals will react with most acids to produce H2 gas?
1.00 mole of pure NOCl and .907 mole of pure Cl2 are placed in a 1.00-L container. Calculate the equilibrium concentration of Cl2(g).
Thiobacillus thiooxidans plays an important role in the sulfur cycle in nature. The organism oxidizes inorganic sulfur compounds, and in the process, obtains energy for the synthesis of ATP. The oxidation of sulfite to sulfate:
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 710.0 torr at 64.7°C. What is the mole fraction of methanol in this solution?
Rate constant at a temperature of 37.8 Celsius is precisely three times that at 25 Celsius. Determine the activation energy in kJ/mol
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..
A sample of an oxide of iron weighing 2.40g was heated in a stream of hydrogen until it was completely converted to the metal,
Determine the final concentration if A 129 mL portion of that solution is diluted using water of 149 mL.
Cesium chloride crystallizes in a cubic unit cell with Cl- ions at the corners and a Cs ion in the center. 1. Count the numbers of positive and negative charges
Bromine can be obtained from the decomposition of calcium bromide by means of electrolysis. If 10.0 g of calcium bromide are dissolved in water
A common way of removing Cr3+ from solution is by precipitation of Cr(OH)3(s). An environmental engineer tells you that adjusting the pH to 8.5 will decrease total soluble Cr(III) to below 1 mg/L (1.92 x 10-5 M). Is this true?
a sample of nitrogen gas kept in a container of vulume 2.43 L and temp 27degree C exerts a pressure of 4.83 atm. calculate the number of moles of gas present
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