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Chemistry Questions and Answers January 08, 2020

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If a forward equilibrium constant for a reaction at given reaction conditions is 2.5. x 102,, what is the Kreverse?

In a mixture of NAD+, NADH, ubiquinone, and ubiquinol which compound will be oxidized? Which will be reduced? Explain.

In step 2 of the procedure in part A, why will blowing in the water via a straw change the pH of the water? Will it acidify the water or make it more basic. Explain.

The fundamental vibrational frequency of HCl is 2889 cm 1. Suppose you introduce 100 molecules in a vessel and you want to predict the intensities in the IR spectra at 2000K. How many molecules will be in the first vibrational level, in the second and in the third?

For the following complexes i) give the formal oxidation state of the metal ii) the d count for the metal ions (e.g. Fe d) ii) sketch the compound iv) give its point group v) provide a qualitative oonly dorbital splitting diagram indicating the correct symbols for the point group (i.e. atg) vi) Indicate if you would predict a JahnTeller

An unknown compound A of molecular formula of C10H180 reacts with H2S04 and heat to form two compounds (B and C) of molecular formula C10H16. B and C both react with H2 over PdC to form decalin. Ozonolysis of B forms D, and ozonolysis of C forms a diketone E of molecular formula C10H16O2. Identify the structures of A, B, C and E. H. decalin

Upon reaction of 3methyl4phenyl2heptanol with concentrated aqueous hydrochloric acid, the major product 4chloro3methyl4phenylheptane was found. Show the mechanism for this reaction.

a) The oscillation of the atoms around their equilibrium positions in the molecule HI can be modeled as harmonic oscillator of mass m = m H (the iodine atom is almost stationary) and the force k = 313.8N/m. Evaluate the separation of the energy levels and predict the wavelength of the light needed to induce the transition between the neighboring

A scuba diver dives with a tank containing 5L of air. Twentytwo percent of the air is oxygen. If the diver produces 1.62 mol carbon dioxide for every 2.05 mol of oxygen heshe inhales, what is the volume (at STP) of carbon dioxide produced if 4.2L of air are consumed at 202.6 KPa and 14.7C

Magnesium reacts with iodine gas at high temperatures to form magnesium iodide. What mass of Mgl2 can be produced from the reaction of unlimited Mg and 13.4 g l2 Mg (s) 12 (1) Mgl2 (s)

The kinetics of the following reductive elimination of biphenyls from Pt(II) diphosphine complexes was investigated. The table below shows some of the results Ar Ar Ph Pt PdLn Ph Ph dtoluene, 100C Ph Ar Ar k(s) 1.8 x 107 Ast (calmol K) AH (kcalmol) Ar Group Ph 7.8 11.5 4.7 x 107 4FC6H4 37.2 11.8 3.6 x 106 2,6F2C6H3 31.7 1.1 2,4,6F3C6H2 C6F5 6.9 x

The following plot shows a typical titration curve for the titration of diprotic acid HA (Kal 1.2 x10 K22.1 x 100) with NaOH. Given that the principal Acontaining species at the first equivalence point is HA. pH Moles of OH added A buffer region is indicated by which of these point(s) ad in the titration curve A) point a and b B) points a and c
The following plot shows a typical titration curve for the titration of diprotic acid HA (Kal = 1.2 x10;