Chapter 7

- Chapter 7 -60:05 g CH 3 COOH(c) ð9 molecules CH 3 COOH6:022 10 23 ¼ 8:975 10 22 gCH 3 COOHmolecules 116:1gC 4 H 4 O 2 ðNH 2 Þ(d) 15 molecules C 4 H 4 O 2 ðNH 2 Þ 226:022 10 23 ¼ 2:892 10 21 gC 4 H 4 O 2 ðNH 2 Þmolecules213. (a)ð25 kg CO 2 Þ 1000 g 1 mol CO2¼ 5:7 10 2 mol CO 2kg 44:01 g CO 2(b)1 mol Pbð5 atoms PbÞ6:022 10 23 ¼ 8 10 24 mol Pbatoms(c)ð6 mol O 2 Þ 6:022 1023 molecules O 2 2 atoms¼ 7 10 24 atomsmol O 21 molecule O 2(d)123:9gP 4ð25 molecules P 4 Þ6:022 10 23 ¼ 5:1 10 21 gP 4molecules P 41 mol W14. (a) ð275 atoms WÞ6:022 10 23 ¼ 4:57 10 22 mol Watoms(b) ð95 mol H 2 OÞ 2O 1kg¼ 1:7kgH 2 Omol H 2 O 1000 g(c)64:07 g SO 2ð12 molecules SO 2 Þ6:022 10 23 ¼ 1:3 10 21 gSO 2molecules SO 2(d)ð25 mol Cl 2 Þ 6:022 1023 molecules Cl 2 2 atoms¼ 3:0 10 25 atomsmol Cl 21 molecule15. One molecule of tetraphosphorusdecoxide (P 4 O 10) contains:1 mol P 4 O 10(a) ð1 molecule P 4 O 10 Þ6:022 10 23 ¼ 1:661 10 24 mol P 4 O 10molecules(b) 1:661 10 24 283:9gP 4 O 10mol P 4 O 10 ¼ 4:714 10 22 gP 4 O 10mol(c)4 P atomsð1 molecule P 4 O 10 Þ¼ 4 atoms P1 molecule P 4 O 10(d)10 O atomsð1 molecule P 4 O 10 Þ¼ 10 atoms O1 molecule P 4 O 10(e)14 atomsð1 molecule P 4 O 10 Þ¼ 14 total atoms1 molecule P 4 O 10-52-