忿6-20. A 4.476-g sample of apetroleum product was burned inatube furnace, and the SO2 produced was col- lected in 3% H,O>. Reaction: SO2(9) 十 H202 一 H2S0O4 A 25.00-mL portion of 0.00923 M NaOH was intro- duced into the solution of H2SO4, following which the excess base was back-titrated with 13.33 mL of 0.01007 M HClL Calculate the parts per million of sulfur in the sample.

AA 訪we Zoerezse What is AZ7 for the formation ofl mole of COatlatm and 255C? CCgraphite) + JO2(9) 一CO(s9) AA五=-110.5kJmol

Calculate the change in internal energy when 2 moles of CO are converted to 2 moles of CO2 at latm and 255C: 2CO(g) + O2(g) 一 2CO2(g) A刀=-566.0 kj/mol

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筷 73:解離能 AgBr 之解離能為 100 kj/mole 試因放烈佃臣 (A), 7J00 nm (B) 2200 mi