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Isomers are molecules that have the same chemical formula but different arrangements of atoms, as shown here for two isomers of pentane, C5H12.
(a) Do you expect a significant difference in the enthalpy of combustion of the two isomers? Explain.
(b) Which isomer do you expect to have the higher standard molar entropy? Explain.
Question- Propane, c2h8, and n-octane, c8h18, are important components of the widely used fossil fuels. The enthalpy change for the combustion of 1 mole propane is -2219 kj and that for 1 mol octane is -5466kj. Calculate the enthalpy change per gr..
Ethylene glycol,C2H4(OH)2, is a colorless liquid used as automobile antifreeze. If the density at 20 degree Celcius of a 4.028m solution of ethylene glycol in water is 1.0241g/mL, What is the molarity of the solution
nbspthe density of diamond is 3.63 gcm3 and the density of lead is 11.0 gcm3. if equal masses of diamond and lead are
What is the pH at the equivalence point? the Ka of hydrofluoric acid is 3.5x10^-4.
A compound, C7H12O4, has an IR spectrum showing a peak at 1735 cm-1. Its 1H NMR spectrum has peaks at delta 1.3 (6 H, triplet), 3.4 (2 H, singlet), and 4.2 (4 H, quartet). Draw its structure
Complete the following reactions comparing alkynes with alkenes. Show the product of each reaction while taking into account regiochemistry and stereochemistry
nitric acid is usually purchased in concentrated form with a 70.3% HNO3 concentration by mass and a density of 1.14% g/ml. How much of the concentrated stock solution in milliliters should you use to make 2.5L of 0.500 M HNO3.
Mixed Aldol Each of the following compounds can be prepared by a mixed aldol condensation reaction. Give the structure of the aldehyde and/or ketone precursors for each aldol product and formulate the reaction.
Some 2-methyl-2-butene may be produced in the reaction as a by-product. Give a mechanism for its production. (The experiment was to react t-pentyl alcohol with HCl.)
a 2.00 l sample of air at -50 degreees c has a pressure of 700 torr. what will be the new pressure in torr if the temp
Bohr's model is used to treat emission lines of hydrogen lamp. It may also be used to study emission lines in mercury lamp or krypton lamp, the other two lamps that are used in this lab.
draw the structure of a compound C5H8O that reacts with 2,4-dinitrophenylhydrazine, decolorizes bromine in dichloromethane, but does not give a positive iodoform test.
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