homework 5 - CH105 F07 Homework #5 Answers 3920 counts =4...

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CH105 F07 Homework #5 Answers 54. 4 980 3920 = counts counts 2 n 4 2 n = = yr yr 460 , 11 5730 2 passed. have lives - half 2 = × 55. 5730 yr; 11,460 yr ½ = 1 half-life, ¼ = 2 half-lives 56. Tritium activity will decrease by half every 12.3 years, the half-life. 12.3 years 50%; 24.6 years 25%; 36.9 years 12.5%; 49.2 years 6.25% The bottle of brandy is only about 49 years old! No, it is not likely authentic. Additional Problems 57. n I He Sb 1 0 124 53 4 2 121 51 + + e Te I 0 1 124 52 124 53 + + 58. n 4 + Lr O + Cf 1 0 263 106 18 8 249 98 Oxygen – 18 59. produced. s neutron wa One n + Mt Fe + Bi 1 0 266 109 58 26 209 83 60. α 4 2 262 107 266 109 + Bh Mt 4 2 258 105 262 107 + Db Bh 61. C + Pb Ra 14 6 209 82 223 88 He + Rn Ra 4 2 219 86 223 88 62. D = m/V V = m/D V = (49,000 g) / (18.75 g/cm 3 ) V = 2,613 cm 3 V = (16,000 g) / (18.75 g/cm 3 )
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V = 853 cm 3 Volume of a sphere = 4/3 π r 3 Volume of Common Spheres Radius (cm) Volume baseball 3.56 188.9899 volleyball
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homework 5 - CH105 F07 Homework #5 Answers 3920 counts =4...

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