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Question- The dissociation constants of ascorbic acid are: pKa1=4.1, pKa2=11.7. Write out the main structures of ascorbic acid at pH=1, pH=6, and pH=14, respectively.Justify your answer
For the following reaction, Kc = 0.513 at 500 K . N2O4(g) 2NO2 (g)
The sugar in deoxyribonucleic acid, DNA, is called 2-deoxy-D-ribose. This sugar has two stereocenters. 2-Deoxy-D-ribose has how many diastereomers
The solution density = 1.013 g/mL and suppose that the density of pure water =1.00 g/mL. Determine the molality of this solution?
Compare the energy cost in ATP equivalents of synthesizing separate from mitochondrial acetyl-CoA to the energy recovered by degrading separate to acetyl-CoA.
the element europium exists in nature as two isotopes eu-151 has a mass of 150.9209 amu and eu-153 has a mass of
Calculate the mass (g) of pure Na3AsO4 (s) and volume (mL) of 1.50 M HCl that are required to make 100.0 mL of a buffer solution at a pH of 6.80 and an H2AsO4-(aq) concentration of 0.100 M
The equilibrium constant for the following gas phase reaction is 0.50 at 600°C. A mixture of HCHO, H2, and CO is introduced into a flask at 600°C.
Use simple structure and bonding models to account for why carbon carbon single bonds in ethane rotate freely while carbon-carbon double bonds in ethene do not rotate.
Two kilograms of steam contained in a horizontal frictionless piston as well as cylinder initially at 250C and 4.81m3 are cooled isobarically until the volume decreases by 19.5%. Presume that heat is transferred at 190C.
Sketch the reaction profile for an exothermic reaction of 25 kJ/mol with an activation energy of 55 kJ/mol. (Be sure to label the transition state on the diagram and include quantitative data.)
The concentration of Pb2+ in a solution saturated with PbBr2(s) is 2.14x10^-2 M. Calculate Ksp for PbBr2.
The two molecules have the same molecular geometry but different electron pair geometries. The two molecules have different electron pair geometries. The two molecules have the same electron pair geometry but different molecular geometries.
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