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Problem- Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition.
A)- nitroglycerin (used medically as a vasodilator to treat heart conditions): C 15.87%H 2.22%N 18.50%O 63.41%.
B)- vanillin (responsible for the taste and smell of vanilla): C 63.15%H 5.30%O 31.55%.
I want you to clarify the chemistry in this above problem.
Calculate the free energy change for the combustion of methane at 250oC. Assume that all reactants and products are gases and that the pressures of the various gases of interest are: methane = 0.56 atm, oxygen = 0.45 atm, carbon dioxide = 2.10 atm..
A solution of 1-pentanol and butanoic acid in ether is shaken with aqueous sodium bicarbonate (NaHCO3) solution. Which of the following correctly describes the major organic contents of the two solutions? Can you explain the answer you chose
Two liquids, A and B, show partial miscibility below 52.4 C. The critical concentration at the upper critical temperature is x=0.459, where x is the mole fraction of A. At 40.0 C the two solutions in the equilibrium have x=0.22 and x=0.60, respect..
Entered the volumes of standardized Na2S2O3 required to reach the endpoint, how many moles of IO3- were present in your samples?
A manometer was connected to a bulb containing nitrogen under slight pressure. The gas was allowed to escape through a small pinhole, and the time for the manometer reading to drop from 65.1 cm to 42.1 cm was 18.5 s.
Calculate the Gibbs free energy (in kJ/mol) at 80 degrees celsius. Assuming that the change in enthalpy is negligible over this temperature range
A buffer solution is prepared by mixing 20.0 mL of 0.032 M benzoic acid C6H5COOH(aq) solution with 25.0 mL of 0.022 M NaC6H5COO(aq). What is the pH of the buffer produced? (Ka of benzoic acid = 6.2 x10-5).
calculate the heat of reaction for 2PbS +3O2 yields 2PbO +2SO2 given the following information. PbS= -93.3 kj/mol. PbO=-219.7. SO2=-296.6. O2 = 0. I got -846kj, is that correct
an element has 3 stable isotopes with natural abundances of 11 17 and 72. the masses of those isotopes are 19.9 21.9
Calculate the molar mass (g/mol) of a gas whose root mean square speed is 796 m/s at 512 K.
a kitchen oven has an interior volume v of 0.12m3 . the initial pressure p0 inside the oven equals the outside pressure
A solution is prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.20 M HOCl. What is the pH of this solution? [Ka(HOCl) = 3.2x10-8]
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