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Draw the kekule structure of each of the following compounds. if cis/trans isomers exist, draw both and indicate the geometry of each. Also draw the structure of a constitutional isomer.
1) CH3CH=CHCH32) (CH3CH2)2C=CHCH2CH33) ClCH=CHF4) CH3CH2CH2CH=C(CH3)25) CH3CH2Ch2CH2CH=CHCH3
The magnesium and calcium ions present in seawater([Mg2+] = 0.059 M and [Ca2+] = 0.011 M) can be separated by selective precipitation with KOH.
The minimum energy needed to eject an electron from a sodium atom is 4.41 X 10^-19. What is the maximum wavelength of light, in nanometers, that will show a photoelectric effect with sodium?
The freezing point of t-butanol is 25.50°C and Kf is 9.1°C · kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 10.2 g sample of t-butanol is 24.59°C, how many grams of water are present in the sample?
If the pH is buffered at 8.2 (as is historically typical for the ocean), what is the molar solubility of CaCO3? F) If the pH is buffered at 7.5, what is the molar solubility of CaCO3?
What is the concentration of lead ions and sulfide ions in a saturated solution of lead sulfide(PbS) solution at 25 degrees Celsius? (Ksp=3.0x10(to the -10 power)
a) What is the reducing and oxidizing agents? b) What are the reducing and oxidation products?
how much energy is liberated when 366 g of mercury (c=0.139j/g degrees celsius)cools from 77.0 C to 12.0 degrees celsius?
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
Photochemical chlorination of heptane gave a mixture of monochlorides containing 15% 1-chloroheptane. What other monochlorides are present? Estimate the percentage of each of these additioanl C7H15Cl isomers in a monochloride fraction.
explain why granulated activated charcoal is considered to be the best available treatment technology for dioxins in water.
A piece of lithium metal was added to a flask of water on a day when the atmospheric pressure was 757.5 Torr. The lithium reacted completely with the water to produce 250.0 mL of hydrogen gas, collected over the water at 23°C, at which temperature..
Calculate the concentration of the acid solution after all teh metal has reacted. Assume that the volume remains unchanged.
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