2. Please circle the structure that corresponds to each statement. A) Phospholipid B) Steroid (CH₂he-CH₂ 00 (CH₂he-CH₂ (CH₂he-CH₂ H₂C C) Secondary Amine E) Lactone N-CH3 G) Tertiary Amide CH3 I) Aromatic Amine NH₂ NH₂ CH₂ OH H3C NH₂ (CH₂)-CH₂ (CH₂)1 CH₂ -OCH 3 NH CH3 HO OH D) Wax F) Lactam CH3 H (CH₂)16-CH3 0-(CH₂)13-CH3 H3C-CH2 H Н H) Heterocyclic amine CH3 H₂C OH OH -NH J) Quaternary ammonium ion CH₂ CH₂ NCI H3C CH3 NH₂ OH 0 0 (CH₂) 16-CH₂ 00 -O (CH₂)16-CH3 (CH₂)-CH₂ (CH₂)16-CH₂ 3. From each of the following pairs circle the compound best described by the statement. A) Molecule forms dimers B) Molecule can form polymers (CH₂)16-CH3 (CH₂)16-CH3 H3C-CH₂ CH₂ H3C 20 NH3CI OH C) His H

Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 is 4.10 and pKa2 is 11.79. When 125 mL of a solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 3.64 g. Your answer is correct. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. 0.164 Hint Your answer is partially correct. What was the pH of the ascorbic acid solution before it was evaporated? pH = 2.44 What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i M M

Ff.258.

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