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科粤版九年级化学周周测九(7.1~7.4)习题课件
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这是一份科粤版九年级化学周周测九(7.1~7.4)习题课件,共23页。
ADDABDCB气体溶解度随压强减小而减小,打开饮料瓶塞,气压减小,二氧化碳溶解度降低,所以有大量气泡冒出H2CO3===CO2↑+H2OKNO336.068ACB49195t1 ℃时,a物质与c物质的溶解度相同75a和bNaOH溶于水放热,c物质的溶解度随温度的升高而减小②⑤①④③药匙18.2小于泥沙过滤时引流蒸发时搅拌氯化钠的溶解度受温度影响变化不大3610不利于后续蒸发溶剂,蒸发溶剂时间会延长,消耗燃料
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