Chapter 2 Homework A
- 1. Chapter 2 Homework ANSWERS 2.18) Sn d = 2.8 * 10 -8 cm r = ½ * d = 1.4 * 10 -8 cm a) −8 1m 1010 A 1.4 *10 cm * * = 1.4 A 100cm 1m 1m 1.4 * 10 −8 cm * = 1.4 * 10 −10 m 100cm b) 1m 1um d = 2.8 *10−8 cm * * − 6 = 2.8 *10− 4 um 100cm 10 m atom 1 * 6um = 2.14 *104 atoms 2.8 *10− 4 um c) 4 V = * Π * r 3 ⇒ r = 1.4 *10 −10 m 3 V = 1.33 * 3.14 * (1.4 *10 −10 m) 3 V = 1.4 *10 − 29 m 3
- 2. 2.26 65 Symbol Zn Ru Sr Ag U Protons 30 44 38 47 92 Neutrons 35 57 49 61 143 Electrons 30 44 38 47 92 Atomic 65 101 87 108 235 Weight 2.44 Molecule Molecular Formula Empirical Formula Benzene C6H6 CH Silicone tetra Chloride SiCl4 SiCl4 diBorane B2H6 BH3 Glucose C6H12O6 CH2O
- 3. 2.60) PF5 Molecular FeCl3 Ionic NaI Ionic LaP Molecular SCl2 Molecular CaCO Molecular Ca(NO3)2 Ionic N2O2 Molecular 2.90) 0.014 * 203.97302 = 2.856 0.241* 205.97444 = 49.640 0.221* 206.97587 = 45.742 0.524 * 207.97633 = 108.98 2.856 + 49.640 + 45.742 + 108.98 = 207.217