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A) Compare the bond enthalpies of the carbon-carbon single, double, and triple bonds to deduce to an average p bond contribution to the enthalpy. What fraction of a single bond does this quantity represent?
B) Make a similar comparison of nitrogen-nitrogen bonds. What do you observe?
C) Write lewis structures of N2H4, N2H2, and N2 and determine the hybridization around nitrogen in each case.
D) Propose a reason for the large difference in your observations of parts a) and b).
Calculate the molarity of a hydrofluoric acid, HF, solution if 50.0 ml of the solution is neutralized by 18.5 mL of 0.400 M NaOH.
For a substance such as carbon dioxide or water, calculate and graph the phase boundaries in the solid vapor, solid liquid, and liquid vapor regions
given 2h2o2 -gt 2h2o o2if 6.06 l of o2 gas is collected over water at 250c vapor pressure 23.8 torr and a barometric
With aqueous H2CrO4, compound A was oxidized to an optically inactive dicarboxylic acid C, C6H10O4. Give structures for compounds A, B, and C; do not specify stereochemistry
a sample containing 0.175 g of cl- is dissolved in 50 ml of deionized h2o. the solution is titrated to the equivalence
A sample of 0.836 gm of unknown compound containing barium ions Ba2+ is dissolved in water and treated with an excess of Na2So4. If the mass of BaSo4 precipitat formed 0.7403 gm, what is the percent by mass of Ba in the orginal unknown compund
The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning the formation and decomposition of ozone in the stratosphere
Blood pH can be altered by changes in breathing. When a person is hyperventilating, they are breathing in rapid, deep breaths.
Using the thermodynamic data below, and a value of -717 kJ/mol for the Ulattice enthalpy for KCl, calculate the ionization energy of K. Hint: Remember to plug in numbers to the equation given in course content.
Aluminum dissolves in HCL according to the equation written below, whereas copper does not react with HCL: 2Al+6HCL ---> 2AlCl3 + 3H2 a 35 gram sample of copper-aluminum alloy is dropped into .750 L of 3M HCl, and the reaction above proceeds as fa..
Calculate in how many years these signs will have to be replaced. Assume that the end lifetime is when the emission from the tritium is down to only 37% from the initial emission when installed
A certain weak acid HA, has a value of 9.7×10?7.Calculate the percent ionization of HA in a 0.10 m solution. Calculate the percent ionization of HA in a 0.010 m solution.
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