6. Esters and amides are most easily made by nucleophilic acyl substitution reactions on ________. (A) acid chlorides (B) carboxylic acids (C) acid anhydrides (D) carboxylates (E) alcohols

5. The following two reactions are important in the blast furnace production of iron metal from iron ore (Fe2O3): Using these balanced reactions, how many moles of O2 are required for the production of 2.51 kg of Fe? (Molecular weight of Fe = 55.85 g/mol) (A)33.7 moles (B) 15.0 moles (C) 135 moles (D)44.9 moles (E) 1.88 moles

6. Esters and amides are most easily made by nucleophilic acyl substitution reactions on ________.
(A) acid chlorides
(B) carboxylic acids
(C) acid anhydrides
(D) carboxylates
(E) alcohols

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