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1311+PS+7+Sp+2010 - (U in 3 oxidation state CH 3 OH c LaN H...

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CHEM 1311 Problem Set # 7 1. Write equations describing each of the following. a. Positron decay of boron-8 b. Beta decay of nickel-63 c. Alpha decay of gold-185 d. Electron capture by beryllium-7 e. Bombardment of rutherfordium-257 with a carbon-12 nuclei to produce californium-245 2. Complete the following nuclear equations. 243 1 244 95 0 96 44 48 20 22 20 4 16 10 2 8 241 1 248 95 0 100 ) ? ) ? ) ? ) ? 4 a Am n Cm b Ca Ti c Ne O d Am n Fm 3. Calculate the amount of 4.4 mg of cobalt 60 remaining after 50 years has passed. The half life of cobalt-60 is 5.26 years. 4. Write reactions describing the processes detailed below: a. U + O 2 (U in +6 oxidation state) b. U + H 2
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Unformatted text preview: (U in +3 oxidation state) + CH 3 OH c. LaN + H 2 O d. Th + F 2 5. Use a radial distribution function to explain the oxidation states observed in lanthanides. 6. Does disproportionation occur ? H (kJ/mol) ErF 2 1020 a. ErF 2 ErF 3 + Er ErF 3 1699 b. GdF 4 GdF 3 + F 2 GdF 4 1310 GdF 3 1699 7. Complete the Born Haber Cycle by identifying any missing pieces: Process H (kJ/mol) Ce (s) Ce (g) +398 Ce (g) Ce + (g) +527 Ce + (g) Ce 2+ (g) +1047 Ce 2+ (g) Ce 3+ (g) +1949 F 2 (g) 2 F (g) +168 F (g) F-(g) -328 Ce 3+ (g) + 3F-(g) CeF 3 (s) -4915...
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