chap3_even_soln

# chap3_even_soln - Chapter 3 Stoichiometry Exercises 22 A =...

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Chapter 3 Stoichiometry Exercises 22. A = 207.2 amu; Pb 24. A = 185 amu 26. GaAs can be either 69 GaAs or 71 GaAs. The mass spectrum of GaAs will have 2 peaks at 144 and 146 with intensities in the ratio of 60:40 or 3:2. ____________ 144 146 Ga 2 As 2 can be 69 Ga 2 As 2 , 69 Ga 71 GaAs 2 , or 71 Ga 2 As 2 . The mass spectrum will have three peaks at 288, 290, and 292 with intensities in the ratio of 36:48:16 or 9:12:4. We get this ratio from the following probability table: 69 Ga (0.60) 71 Ga (0.40) 69 Ga (0.60) 0.36 0.24 71 Ga (0.40) 0.24 0.16 _____________________ 288 290 292 28. 5.391 × 10 24 atoms Fe 30. 0.10 g C 32. HFC – 134a = 102.04 g/mol HCFC – 124 = 136.48 g/mol

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34. a. 219.88 g/mol b. 310.18 g/mol c. 141.96 g/mol 36. a. 4.55 × 10 -3 mol P 4 O 6 b. 3.22 × 10 -3 mol Ca 3 (PO 4 ) 2 c. 7.04 × 10 -3 mol Na 2 HPO 4 38. a. 1.10 × 10 3 g P 4 O 6 b. 1.55 × 10 3 g Ca 3 (PO 4 ) 2 c. 7.10 × 10 2 g Na 2 HPO 4 40. a. 619 g P b. 310. g P c. 155 g P 42. a.
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chap3_even_soln - Chapter 3 Stoichiometry Exercises 22 A =...

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