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Suppose polyethylene molecules in a solution can exist in either a random-coil conformation or in a fully stretched-out conformation. The stretched-out conformation is 2.4 kJ/mol higher in energy than the random-coil conformation. What percentage of molecules are in the stretched-out conformation at 20 degrees Celsius?
bismuth oxide reacts with carbon to form bismuth metal:when 217g of Bi2O3 reacts with carbon, how many moles of Bi2O3 react?
Determine the mass of CO_2 produced by burning enough carbon (in the form of charcoal) to produce 490 kJ of heat.
The mass spectrum of an organic compound shows the relative abundances of M to be 58.09% and M 1 to be 15.08%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound
The mass of the Earth's Moon is 7.35 x 10^22 kg. what is the mass expressed in megagrams , Mg?
When 17 mL of a solution containing .29 M Ca(OH)2 is diluted to 30 mL, a dilute solution is formed. What is the OH- concentration in 5 mL of the dilute solution?
Estimate the age of a bottled wine that has a tritium, 3^H, content 65.% that of freshly bottled wine. Tritium decays by beta decay and has a half life of 12.3 yr.
Determine the mass of H 2 O is formed if oxygen of 10.0L react completely in the given equation?
What is the density of a block of marble that occupies 350 cm3 and has a mass of 660 g?Answer in units of g/cm
Draw the product that is formed when (3R, 6R)-6-chloro-2,3-dimethyloctane reacts with sodium iodide in acetone
How many grams of the solid can be formed from 286 grams of calcium nitrate and 136 grams of Phosphoric acid?
slower than Friedel-Crafts alkylation of benzene and gives a mixture containing mostly o- and p-tert-butyltoluene. d. slower than Friedel-Crafts alkylation of benzene and gives mostly m-tert-butyltoluene.
What is the pH of a solution that is 0.10 M CH3NH2 (methylamine) and 0.15 M methylammonium chloride
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