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家庭厨房实际上就是一个化学世界,“柴米油盐酱醋糖”等都是化学物质.请问: (1)加碘食盐所含碘酸钾(KIO 3 )中,I元素化合价是_________. (2)白糖与红糖,主要成分都是蔗糖.利用浓硫酸的_________性,可将白糖逐渐炭化. (3)食醋不慎滴在大理石台面上,会使其失去光泽,变得粗糙.这是因为食醋中的_________(填化学式)与大理石发生了化学变化. (4)我市多数家庭厨房中的“柴”将被“西气东输”工程送来的“天然气”所替代,写出天然气主要成份的化学式_________. (5)油脂的组成元素和淀粉_________(填“相同”或“不同”).
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