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Assignment 2-solution

07 km surface area of earth 807 807 where r is earths

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Unformatted text preview: area of earth = 8.07 =8.07 where r is Earth’s radius which 6370 5.1 4. Sketch the following molecules: CFC-113, CFC-114, HCFC-22. and HCFC-123. Solution #4: 1. CFC-113 C = 1+1 = 2 H = 1-1 = 0 F=3 Cl = 6-3 = 3 2. CFC-114 C = 1+1 = 2 H = 1-1 = 0 F=4 Cl = 6-4 = 2 3. HCFC-22 C = 0+1 = 1 H = 2-1 = 1 F=2 Cl = 4-1-2 = 1 4. HCFC-123 C = 1+1 =2 H = 2-1 = 1 F=3 Cl = 6-1-3 = 2 5. D uring 1990 - 1993 the production of CFC - 11 dropped, averaging only 1.9 g/year over these four years. By the beginning of 1994, emissions were sufficiently low to be neglected. Write the expression for C(t) over the entire range 1990-2050. For consistency with the notation in Example 11.9 in the class notes, let...
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