Organic Chemistry Answers

contains a heterocyclic ring

Calculate the output of the reaction N2+3H2=2NH3 by nitrogen as a base. General pressure is 50·105 pa, equilibrium constant is K=1,64·10-4

14. 6 mL of 1.0M CuSO4(aq) is mixed with 8 mL of 1.0 M Na2S(aq) to produce 0.250 g CuS, a black precipitate. The balanced chemical equation for this reaction is: CuSO4 + Na2S  CuS + Na2SO4.

a) What is the limiting reactant in this reaction?


b) Calculate the theoretical (maximum yield) of CuS in grams.



c) What is the percent yield of this reaction?

UV light brings about the homolysis of peroxides. Draw the curved arrow notation for this reaction in Part 1, then identify the kind of mechanistic step this would be in Part 2.

What type of reaction is the one shown below for a free-radical chain mechanism? CH3CH2⋅ + Cl⋅
= CH3CH2Cl

Sample 10 is the spectrum recorded for an ethanol sample destined for dilution with various additives and water to give a fine flavoursome alcopop. However as the spectrum demonstrates the sample has been contaminated with two chemicals both of which you have encountered in this exercise previously and both of which are irritants (to the eyes, skin and through ingestion). In order to prevent the ruination of further batches of alcopops you are required to:

(a) Identify the two unknown compounds and assign the signals of the ethanol to the chemical structure.

(b) Calculate the relative proportions (as a ratio) of the three compounds in this ‘chemical cocktail’

The reaction with 2-bromo-2methylbutane by an Sn1 mechanism using structural formulas and curly arrows.

Mechanism of formation of diazonium salt

Can we break double-bonds by using laser and heat? (without presenting any iquids)

A gas mixture consisting of 5 L of propane and 200 L of air (20% v / v O2, 80% v / v N2) is ignited. What is the volume of exhaust after cooling? The volumes were measured at the same pressure and temperature conditions