please use the given information to answer.

TABLE 4-7 SIMPLE IONIC STRUCTURES GROUPED ACCORDING TO ANION PACKING Coordination number of Mand o Anion packing Cation sites Structure name Examples C Cubic dose-packed 6:6 MO All octahedral Rocksalt Cubic close-packed Cubic close-packed 4.4 MO 4:8 M, Half tetrahedral All tetrahedral Zinc blende Antifluorite Cubic close-packed 12:6:6 ABO, One-fourth octahedral (B) Perovskite Simple cubic 8:8 MO 8.4 MO, All cubic Half cubic CSCI Fluorite NaCl, MgO, FeO, Ny0, CaO, Sr0, MnO, Bao Zns, BeO, SIC LO, Na,O, KO, Rb, COTTO. SrTiO Srsno,, S+Zro; CsCl, CsBr, Csi Thoz, CeO; PrO, UO, 2:0, HfO ZnS, ZnO, SIC T:0;, GO SnO, PO, IVO, NDO AI,O,, Fe,0,1 Cr,O, T120 Hexagonal close-packed Distorted cubic 4:4 MO 6:3 MO, Half tetrahedral Half octahedral Wurtzite Rutile Hexagonal close-packed 6:4 M,0 Two-thirds octahedral Corundum Dele 2CS + 4HCS.H, + CH + heat (months) 200 W/kg in 30 S H 0 103 450 Heat evolved 40 81 1 1 I Setting period Hardening Compressive strength Heat evolved (W/kg) 30 D Compressive strength (MPa) 20 Setting i exotherm 1 410 Hardening exotherm 10 10 10 10 10 Days 450, 500, 550, 600, 650, and 700 mers. What is the mass average molecular weight in amu? 4-9. A copolymer of polyvinyl chloride and vinyl acetate contains a ratio of 19 parts of the former to 1 part of the latter. If the molecular weight is 21,000 g/mol what is the degree of polymerization? Note: The vinyl acetate mer contains 4 C, 6 H, and 2 O atoms. TABLE 4-7 SIMPLE IONIC STRUCTURES GROUPED ACCORDING TO ANION PACKING Coordination number of Mand o Anion packing Cation sites Structure name Examples C Cubic dose-packed 6:6 MO All octahedral Rocksalt Cubic close-packed Cubic close-packed 4.4 MO 4:8 M, Half tetrahedral All tetrahedral Zinc blende Antifluorite Cubic close-packed 12:6:6 ABO, One-fourth octahedral (B) Perovskite Simple cubic 8:8 MO 8.4 MO, All cubic Half cubic CSCI Fluorite NaCl, MgO, FeO, Ny0, CaO, Sr0, MnO, Bao Zns, BeO, SIC LO, Na,O, KO, Rb, COTTO. SrTiO Srsno,, S+Zro; CsCl, CsBr, Csi Thoz, CeO; PrO, UO, 2:0, HfO ZnS, ZnO, SIC T:0;, GO SnO, PO, IVO, NDO AI,O,, Fe,0,1 Cr,O, T120 Hexagonal close-packed Distorted cubic 4:4 MO 6:3 MO, Half tetrahedral Half octahedral Wurtzite Rutile Hexagonal close-packed 6:4 M,0 Two-thirds octahedral Corundum Dele 2CS + 4HCS.H, + CH + heat (months) 200 W/kg in 30 S H 0 103 450 Heat evolved 40 81 1 1 I Setting period Hardening Compressive strength Heat evolved (W/kg) 30 D Compressive strength (MPa) 20 Setting i exotherm 1 410 Hardening exotherm 10 10 10 10 10 Days 450, 500, 550, 600, 650, and 700 mers. What is the mass average molecular weight in amu? 4-9. A copolymer of polyvinyl chloride and vinyl acetate contains a ratio of 19 parts of the former to 1 part of the latter. If the molecular weight is 21,000 g/mol what is the degree of polymerization? Note: The vinyl acetate mer contains 4 C, 6 H, and 2 O atoms