ExamI_solns - CH201 Examination I solutions and references...

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Examination I solutions and references Explicit values for α -version β -version is directly analogous . Problem I. See WA Q01, #s 2, 5, 7, 8. Exp. 1.6 of text. Mass percent oxygen: % 4 . 28 100 325 30 . 92 = × Tot mg mgO Empirical formula: mmolC mol mg mgC 33 . 15 / 12 6 . 184 = mmolN mol mg mgN 92 . 1 / 14 51 . 26 = mmolH mol mg mgH 11 . 21 / 01 . 1 32 . 21 = mmolO mol mg mgO 77 . 5 / 16 30 . 92 = Divide by the smallest, 1.92 to get 8 C; 11H; 3O; 1N => C 8 H 11 O 3 N Problem II. Q03 # 1, 5; Exp 2.1, 2.22(a) and (b) g mg mmol mg mL mmol mL 1 . 44 10 41 . 4 212 85 . 0 245 4 = × = × × M M iM Mc 4 . 3 85 . 0 4 = × = = I = 4 since - + + 3 4 1 4 3 3 PO K PO K one potassium phosphate makes four total ions. Problem III. Q05, #s 2 & 3 (especially #3); practice example 2.14; Exp 2.25 c c b b b c b m m k T T m k T = = - = - = 368 . 0 71 . 1 95 . 55 58 . 56 m c = m since i = 1 for a non-electrolyte. solute
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This note was uploaded on 09/27/2009 for the course CHEM 201 taught by Professor Warren during the Spring '09 term at N.C. State.

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ExamI_solns - CH201 Examination I solutions and references...

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