3-TABLE 1. Polystyrene Molecular Weight InformationMolecular Weight(M, g/mol)20,00040,00060,00080,000100,000120,140,000160,000FractionMass (g)0.300.902.206.007.004.001.800.903.46.8.(I). As a quality control engineer for a leading producer of polystyrene, your job is toensure that each batch has a similar molecular weight distribution. A sample of a batchof polystyrene yields the molecular weight information as shown above. For this sample,calculate the:(a) Mn (b) Mw (c) PDI

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Answered: (a) Mn (b) Mw (c) PDI

Chemistry

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ISBN:9781305957404

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Chapter1: Chemical Foundations

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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Write balance redox reactions, for the following short hand notations: (a) Cu(s) | Cu²“(aq) || Cr,0;²"(aq), Cr³*(aq), H3O*(aq) | Pt(s) (b) Pt(s) | Cl(aq) | C2(g) || MnO,"(aq), Mn²*(aq), H3O*(aq) | Pt(s) Se + Cr(OH)3→ Cr+ SeO3²- (basic)
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Assuming the following reaction proceeds in the forward direction, 3 Sn4*(aq) + 2 Cr(s) à 3 Sn2*(aq) + 2 Cr3*(aq) which of the following is correct? O A. Cr(s) is the reducing agent and Cr"(aq) is the oxidizing agent. O B, Sn4+ (aq) is the reducing agent and Cr(s) is the oxidizing agent. OC Sn4+ DC. (aq) is the reducing agent and Sn2+ (aq) is the oxidizing agent. Op. Cr(s) is the reducing agent and Sn-"(aq) is the oxidizing agent. O E. Cr(s) is the reducing agent and Sn4 (aq) is the oxidizing agent.
Complete and balance the following equations for reac- tions taking place in acidic solution. (a) MnO, (aq) + H,S(aq) → Mn²+ (aq) + SO? (aq) (b) Zn(s) + NO, (aq) → Zn²* (aq)+ NH (aq) (c) H,O,(aq)+ MnO, (aq) (d) Sn(s) + NO3 (aq) (e) UO* (aq) + Te(s) → U** (aq) + TeOž¯ (aq) → 02(g) + Mn²* (aq) 4+ → Sn** (aq) + N2O(g)
Balance each redox reaction using the half-reaction method. (a) K(s) + Cr³*(aq) –→ (b) Mg(s) + Ag*(aq) → Mg²*(aq) + Ag(s) (c) Al(s) + Fe²*(aq) –→ Al³*(aq) + Fe(s) Cr(s) + K*(aq)
calculate the standard emf for each of tne following reactions: (a) H2(8) + F(8) → 2H*(aq) + 2 F (aq) (b) Cu2" (aq) + Ca(s) → Cu(s) + Ca²*(aq) (c) 3 Fe2*(aq) → Fe(s) + 2 Fe³*(aq) (d) 2 CIO, (aq) + 10 Br (ag) + 12 H*(aq) → Cl2(8) + 5 Br2(1) + 6 H20(I)
Write the expression Kc for the following reactions. (a) Fe2+(aq) + Ce4+(aq) ⇋ Fe3+(aq) + Ce3+(aq) (b) CaCO3(s) ⇋ CaO(s) + CO3(g)
(Q82) What is the oxidation number for phosphorus in each of the following? Please include the positive and negative signs as appropriate. (a) НзРОД (b) P4 (this reflects the elemental state of phosphorus) (c) PH3 (d) PO43- (e) p3-
1. Which of the following reactions involves oxidation but not reduction? (a) NH3 + HCI→ NH,Cl (b) Fe2O3 + 3 Mg → 2 Fe + 3 MgO (c) Cu2+ + Zn → Cu + Zn²+ (d) None of the above. (e) All of the above.

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