Chapter 7

- Chapter 7 -6. Number of grams.(a) 4:25 10 4 98:09 g H 2 SO 4mol H 2 SO 4 ¼ 0:0417 g H 2 SO 4mol H 2 SO 4(b) 4:5 10 22 1 mol153:8 g CCl4molecules CCl 46:022 10 23 ¼ 11 g CCl 4molecules mol CCl 4 47:87 g Ti(c) ð0:00255 mol TiÞ ¼ 0:122 g Timol Ti(d) 1:5 10 16 atoms S 32:07 g S6:022 10 23 ¼ 8:0 10 7 gSatoms S7. Number of molecules(a) ð2:5 mol S 8 Þ 6:022 1023 molecules¼ 1:5 10 24 molecules S 8mol(b)ð7:35 mol NH 3 Þ 6:022 1023 molecules¼ 4:43 10 24 molecules NH 3mol(c)ð17:5gC 2 H 5 OHÞ 1023 molecules¼ 2:29 10 23 molecules C 2 H 5 OH46:07 g C 2 H 5 OH(d)ð255 g Cl 2 Þ 6:022 1023 molecules¼ 1:91 10 24 molecules Cl 270:90 g Cl 28. Number of molecules(a) ð9:6 mol C 2 H 4 Þ 6:022 1023 molecules¼ 5:8 10 24 molecules C 2 H 4mol(b)ð2:76 mol N 2 OÞ 1023 molecules¼ 1:66 10 24 molecules N 2 Omol(c)ð23:2gCH 3 OHÞ 1023 molecules¼ 4:36 10 23 molecules CH 3 OH32:04 g CH 3 OH(d)ð32:7 g CCl 4 Þ 6:022 1023 molecules¼ 1:28 10 23 molecules CCl 4153:8 g CCl 49. Number of atoms 7 atoms(a) ð25 molecules P 2 O 5 Þ1 molecules(b) ð3:62 mol O 2 Þ 6:022 1023 moleculesmol¼ 1:8 10 2 atoms 2 atoms¼ 4:36 10 24 atoms1 molecule 3 atoms¼ 2:20 10 25 atoms1 molecule(c) ð12:2 mol CS 2 Þ 6:022 1023 moleculesmol-50-