General Inorganic and Organic Chemistry – Exam

Balance the following chemical equation:

_C8H18(l) + _O2(g) è _CO2(g) + _H2O(g)

Calculate the oxidation number of cobalt in the given compound. K[Co(C2O4)2(NH3)2]

Recipient of the 1911 Nobel Prize in chemistry and discoverer of the chemical elements polonium and radium.

In the electromagnetic spectrum, which has a wavelength typically ranging from 15 microns to 1 mm?

The radioisotope most widely used in medicine.

A retarding potential of 2.38 volts just suffices to stop photoelectrons emitted from potassium by light of frequency 1.13 x 10^15 s−1. What is the work function, W, of potassium?

What is the de Broglie wavelength of an electron travelling at 7 x 10^6 m s-1?

Electrons are accelerated through a p.d. of 54 V. Calculate the de Broglie wavelength of the electron.

Plutonium-239 can be produced by bombarding uranium-238 with alpha particles. How many neutrons will be produced as a by product of each reaction?

When bombarded with neutron, cobalt-59 is converted to __.

Neutron bombardment of plutonium-239 yields americium-240 and another particle. Identify the other particle produced.

The rate constant for the second order reaction 2NO2 → N2O4 is 2.79 L/mol-min at 48 deg C. If the initial concentration of NO2 is 1.05 M, what is the half-life per 1 mol of NO2?

The gas phase reaction below obeys the rate-law expression rate = k[PCl5]. At 400 K, the specific rate constant is 0.0371 min^-1. How many hours are required to reduce a sample of PCl5 to 10% of its original amount?

PCl5 → PCl3 + Cl2

Suppose the activation energy of a certain reaction is 250 kJ/mol. If the reate constant at T1 = 300K is k1 and the rate constant at T2 = 320 K is k2, then k2/k1 = ______.

In order to study the kinetics of the enzyme succinic thiokinase, the biochemistry lab ordered 250 microcuries (μCi) of a radioactively-labeled compound, [1,4-14C] maleic anhydride. How many disintegrations per second would take place in this sample of maleic anhydride?

The isotopic mass of  is 58.9332 amu. What is its mass deficiency in amu per atom?

In the gas phase, methyl isocyanate (CH3NC) isomerizes to acetonitrile (CH3CN);

H3C-N≡C (g) → H3C-C≡N (g)

with delta H = -89.5 kJ/mol and delta G = -73.8 kJ/mol at 25 deg C. Find the equilibrium constant for this reaction at 100 deg C.

Given: PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)

At 250 deg C, a sample of PCl5 was placed in a 24-liter evacuated reaction vessel and allowed to come to equilibrium. Analysis showed that at equilibrium, 0.42 mole of PCl5, 0.64 mole of PCl3, and 0.64 mole of Cl2 were present in the vessel. Calculate Kp for the reaction at 250 deg C.

The half-life for the reactant A in the first order reaction

A → B is 36.2 seconds. What is the rate constant for this reaction at the same temperature?

Which of the following is the conjugate base of the following acid: SH3+?

What is the relationship of the two compounds: (3R,4S)-3-chloro-4-methylhexane and (3R,4R)-3-chloro-4-methylhexane?

What is the IUPAC name of the expected major product formed upon reaction of HCl with 3-methyl-1-butene?

Wilkinson’s catalyst accomplishes which of the listed molecular transformation?

Which of the following statements is true about propyne,

H-C≡C-CH3?

Calculate the degree of unsaturation for C5H5Br2NO.

Determine the percent enantiomeric excess of the mixture containing 12.8 mol (R)-2-bromobutane and 3.2 mol (S)-2-bromobutane.

A mixture contains 3g of (+)-2-bromobutane and 2g of (–)-2-bromobutane. What is the rotation of the mixture, given that (+)-2-bromobutane has a specific rotation of +23.1 deg.

The antimalarial alkaloid quinine, C20H24N2O2, is optically active. An ethanol solution of 8g quinine in 100mL displays a rotation of -13.6 deg in a 1dm polarimeter tube. What is the specific rotation of quinine?

Which of the following is a meta-directing deactivator?

Reaction involving the reduction of aldehyde or ketone to the corresponding alkane via a dithioacetal with the presence of H2 and Raney nickel.

What is the IUPAC name of tosyl chloride, commonly abbreviated as TsCl.

Which of the following describes the effect of a catalyst on a reaction?

Treatment of alkyl halide with a base that is sterically hindered yields a _____.

Oxymercuration-demercuration of propene produces _____.

What is the IUPAC name for the following compound?

PhCH2CH2CHO

The electrophoile in the sulfonation reaction of benzene is: