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What is the NMR spectrum of benzeneSuppose Dewar,Ladenburg,and Kekul?? had had a 13 C NMR spec- trometer. How many signals would the various candidates show in their spectra? How many would cyclohexatriene show?
a sample of gas mixture from a neon sign contains 0.0856 mol ne and 0.0254 mol kr. what are the mass percentages of ne and kr in the gas mixture?
The half-life for the reaction at 550 C is 81.3 seconds. How long does it take for 78.5% of a phosphine sample to decompose?
In combustion analysis, 2.00mg of vitamin C yielded 3.00mg CO2 and 0.816mg H2o. From mass spectrometry, it was found that the molecular weight of vitamin C is 176amu. Determine the mass composition of vitamin C, its empirical formula, and its molecul..
A 1-ft-diameter cylinder is closed on one end and fitted with a moveable piston on the other. With 1 atm applied pressure, the piston is located 20 ft from the closed end
Determine theoretical yield, limiting agent and excess reagent - How much excess reagent remains after the reaction goes to completion
Calculate the theoretical yield of C2H5Cl when 106 g of C2H6 reacts with 236 g of Cl2 assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl
What type of bonding between amino acid residues is most important in holding a protein and polypeptide in a specific secondary configuration?
A cylinder of oxygen gas contains 26.4 g of O2. Another cylinder, twice the volume of the cylinder containing oxygen (and at the same conditions of pressure and temperature), contains CO2 gas.
The heat of reaction for the combustion of cyclobutane, C4H8, is 650.3 kcal/mol. What is the heat of combustion for cyclobutane in kcal/gram?
What is the molarity of a solution in which 2.69 g of C12H22O11 (MM=342.29 g/m) is dissolved in enough water to make 225 mL of solution?
Find out how much energy is needed to raise the temperature of 22.8 g of diethyl ether from -10.0 degree celsius to 142.0 degree celsius?
A thief plans to steal a gold sphere with a radius of 30.0 cm from a museum. If the gold has a density of 19.3 g/cm^3, what is the mass of the sphere?
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