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The following reaction occurs spontaneously.
2Al(s) + 6H+(aq) → 2Al3+(aq) + 3H2(g)
Write the balanced oxidation half-reaction.
1. Al(s) → Al3+(aq) + 3e-
2. Al3+(aq) + 3e- --> Al(s)
3. H2(g) --> 2H+(aq) + 2e-
4. 2H+(aq) + 2e- --> H2(g)
5. 2H+(aq) --> H2(g) + 2e-
A sample of helium gas, He, at 22 degrees C and 101.3 kPa occupies a volume of 2.54L. At a constant pressure, what volume will it occupy at a liquid nitrogen tempature of -197 degrees C?
Each student recorded the temperature change and calculated the enthalpy of neutralization. Two of the chemists will report, within experimental error, the same temperature change for the HCl/NaOH reaction. Identify the two students and explain
calculate the pH and concentration of all species present assuming that the activity coefficients are equal to 1.0 for all species
Write out a detailed mechanism for the formation of dibenzalacetone, using acetone + benzaldehyde in NaOH.
An aqueous solution containing 5.85g of an optically pure compound was diluted to 800.0mL with water and placed in a polarimeter tube 10.0cm long. The measured rotation was -5.93degrees at 25degrees C. Calculate the specific rotation of the compou..
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A a student started with a mixture weighing 1.356 gm. The student recovered 1.543 g . Assuming that all calculations were done correctly what was the most likely source of error in the experiment
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What is the pH of the buffer that result when 12 g of NaH2Po4 and 8.00 g of NaHPO4 are diluted with water to a volume of 0.50 L ? ( Ka of H2PO4- = 6.2*10^-8 , the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol respectively )
a solution is prepared by adding 1.91 mg of an unknown protein to enough water to make a 12.7 ml solution. the osmotic
Suppose you have 5.00 g of powdered magnesium metal, 1.00 L of 2.00 M potassium nitrate solution, and 1.00 L of 2.00 M silver nitrate solution. (a) Which one of the solutions will react with the magnesium powder?
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