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The π electrons in benzene can be approximated as particles ona ring. Calculate the diameter of this "electron ring" if it is assumed that a transitionoccurring at 260.0 nm corresponds to an electron going from n = 3 to n = 4. Compare thisdiameter to the diameter of a benzene molecule, if you approximate the carbonhexagon with a circle.
consider the reactionn2g3h2g-----gt2nh3gsuppose that a particular moment during the reaction molecular hydrogen is
What is the pH at the equivalence point when 40.00 mL 0.100 propionic acid, CH3CH2COOH, Ka = 1.3 x 10-5, is titrated with 0.1000 M NaOH?
compute the mass of h2o formed when 22 grams of propane are burnt if 4.4grams of propane are burnt in excess o2 7.2g of
If Ecell =1.44 V for a reaction utilizing 2 moles of electrons for each mole of electrons for each mole of desired product, but measurement shows that Ecell=1.56 V and the temperature is 15 celsius, what is Q
Find the pH of the resulting solution when 20.00mL of a 0.1000M triethylamine (CH3CH2)3N (Kb = 5.2x10-4) solution is titrated with 20.05mL of a 0.1000M HCl solution.
a 251 mL sample of oxygen is collected over water at 25 deg C and 760 torr pressure. If the vapor pressure of water as 25 deg C is 23.8 torr, what is the pressure of the dry gas alone?
The first-order rate constant for the decay of the radioactive isotope carbon-14 is 1.2 x 10-4 year-1. What fraction of the carbon-14 initially in a sample is still present 1500 years later
Water is flowing in a horizontal pipe (1 inch, schedule 40) with a velocity of 2 ft/s and a pressure of 10 psia. The water enters a second section of pipe that is 4 inch schedule 40. What is the pressure in the section of pipe if friction can be i..
An acre of corn can produce about 375 gallons of ethanol, using only the kernel of the corn for conversion to ethanol. Assume the energy input to produce an acre of corn is 15000000 kJ.
An aqueous solution of fotmic acid can be used to promote a ring-closing reaction
what is the approximate frequency of a photon having an energy 4.85 x 10-19 j? h 6.63 x 10-34
How much ice in grams would have to melt to lower the temperature of 51.0 g of water from 65.0*C to 0*C
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