19. What type of carbon environment does not generate a signal in the DEPT-90 spectrum and gives a positive peak in the DEPT-135 spectrum? (A)methine (B) methylene (C) quaternary (D)methyl (E) carbonyl

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

19. What type of carbon environment does not generate a signal in the DEPT-90 spectrum and gives a positive peak in the DEPT-135 spectrum?
(A)methine
(B) methylene
(C) quaternary
(D)methyl
(E) carbonyl

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