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Formaldehyde, H2C = O, is known to all biologists because of its usefulness as a tissue preservative. When pure, formaldehyde trimerizes to give trioxane, C3H6O3, which, surprisingly enough, has no carbonyl groups. Only one monobromo derivative (C3H5BrO3) of trioxane is possible. Propose a structure for trioxane.
Why was cold deionized water added to the reaction mixture rather than hot water, and what is the purpose of acetic acid?
How many moles of hydrogen are present in a 26.3 mL sample at 19 degrees celsius and 744 torr?
derive the clayperon equation. what is the primary use in phase diagrams? can you use it to justify the relative slopes
a nonelectrolyte compound nbspof 33.8 g is dissolved in 160.0 grams of a solvent that has a normal freezing point 27.7
A rolaids tablet contains calcium carbonate which neutralizes stomach acid If 44.55mL of 0.448 M hydrochloric acid is required to neutralize one tablet how many milligrams of calcium carbonate are in a rolaids tablet
Some anesthetic drugs relieve pain by interfering with various parts of the action potential (discussed in class). Give a brief description of how the two drugs below may work as pain-blockers.
Give the structures of two different aromatic compounds that could be used to synthesize benzene-1,2-dicarboxyclic acid
identify the following compound from its IR and proton NMR spectra. C5H6O: IR: 3300 (sharp), 2102, 1634 cm-1 NMR: ? 3.10 (1H, d, J = 1 Hz); ? 3.79 (3H, s); ? 4.52 (1H, doublet of doublets, J = 10 Hz and 1 Hz); ? 6.38 (1H, d, J = 10 Hz)
The human body obtains 1091 kJ from a candy bar. If this energy were used to vaporize water at 100°C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)
The DHfus of ethanol (C2H5OH) is 4.60 kJ/mol. How many kilojoules of heat are required to melt 24.5 g of ethanol at its freezing point.
The freezing point of pure benzene is 5.48 degrees Celcius, and Kf for benzene is 5.12 degrees C/m. Calculate the molar mass of the unknown compound.
Calculate the grams of sloute required to perpare 750ml of a 7.5 x10-3 M from NiSO46H2O.
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