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The threshold frequency of dislodging an electron from a zinc metal surface is 8.54x10^14 Hz. Calculate the minimum amount of energy required to remove an electron from zinc surface.
what is the underlying electronic reason for all periodic trends?
The initial rate of a reaction 2A + 3B -> C + 2D was measured using different initial concentrations of A and B. Calculate the value of k
Write a net ionic equation for the reaction between aqueous solutions of ammonia and hydrofluoric acid.
At a certain temperature, the pH of a neutral solution is 7.45. What is the value of Kw at that temperature
consider the following reactioncogh2ogin equilibrium with co2gh2kc102 at 500 ka reaction mixture initially contains
What is the pH of the buffer after the addition of 10.0 mL of 0.10 M HCl to 65.0 mL of the buffer?
A sample of an unknown gas effuses in 12.4 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.59 min.
When 0.564g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.3C to 29.8.C Find Delta Erxn for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined in a s..
required to reach the first equivalence point of a solution of citric acid (H3C6 H5O7), how many ml of NaOH are required to completely neutralize this solution
A gas bottle contains .650 mol of gas at .961 atm pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle.
A solution is prepared by combining .025 mole CaCl2 and .015 mol Pb (NO3)2 and adding water to make 1L of solution. Will a precipitate of PbCl2 form in this solution
What is the mechanism for the reaction between acetophenone and p-anisaldehyde is the presence of sodium hydroxide. Include arrows showing electron movement. The product is trans-p-Anisalacetophenone.
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