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Explain what are the concentrations of acetic acid as well as acetate ion in 0.20M acetate buffer, pH 4.90? The pKa of acetate is 4.76.
Explain A particular 12V battery is based on a reaction having a standard cell potential, E0+1.92 V. Define what happens when the battery "dies"
why is natural vanillin ethanolic extract considered to be of higher quality and therefore more expensive than the synthetic vanillin solution in ethanol
assuming complete dissociation of the solute how many grams of kno3 must be added to 275 ml of water to produce a
Chemical-plant equipment costs rarely vary in proportion to size. In the simplest case, cost C varies with size S according to the allometric equation 18 Chemical Engineering Thermodynamics C = ?S?
For each of the following experimental or calculations errors, tell of the calculated value of R, writte if would be too high, too low or unchanged.
The pH of a 0.0100 M hypothetical acid, HA, is 4.00. Calculate the Ka for this hypothetical acid.
The entropy increase after mixing 2 moles of oxygen 1 mole of nitrogen, which were prepared at the same pressure and temperature, is (in J/K). (Pretend oxygen and nitrogen are ideal gases)
Alfred bought a new graduated cylinder for his chemistry class. It holds 416 milliliters of liquid. If the cylinder has a radius of 4 cm, then how tall is the cylinder?
the calorimeter itself absorbs a negligible amount of heat, calculate combustion eneergies (change of energies) for benzene in both kj/g and kj/mol.
An electron in the n=1 Bohr orbit has the kinetic energy K1. In terms of K1, what is the kinetic energy of an electron in the n=2 Bohr orbit
metallic aluminum reacts with mno2 at elevated temps to form manganese metal and alunimun oxide. a mixture of the two
Explain what are the concentrations of H3Cit, H2Cit-, and HCit2- in a sample of lemon juice that has a pH of 2.30 and a total concentration of the four citrate-containing species of .350 M? Presume that [Cit3-] is 0. Explain what is the concentrat..
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