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31. ( )市面上醫藥用雙氧水,是重量百分濃度為 4%的過氧化氫(H2O2)水溶液,若今有一瓶質量為200 公克的雙氧水,則有關此瓶雙氧水的敘述,何者錯誤? (A)其中含有 8 公克過氧化氫及190
問題詳情
31. ( )市面上醫藥用雙氧水,是重量百分濃度為 4%的過氧化氫(H2O2)水溶液,若今有一瓶質量為200 公克的雙氧水,則有關此瓶雙氧水的敘述,何者錯誤?
(A)其中含有 8 公克過氧化氫及190 公克的水
(B)若將此瓶雙氧水拿來製造氧氣可添加二氧化錳當催化劑
(C)雙氧水分解出的氣體難溶於水,故採用排水集氣法收集
(D)該瓶雙氧水的溶劑為水。
參考答案
上一篇 :
30. ( )某生配製食鹽水溶液,當溶液達到飽和後,杯底尚留少許食鹽晶體,隔天中午發現食鹽結晶已消失,下列哪一項敘述比較能解釋此現象? (A)食鹽在水中放置愈久,溶解度愈大 (B)隔天中午氣溫較高,食
下一篇 :
32. ( )有關鈍氣的敘述,下列何者正確?(甲)鐵工廠常使用氦氣來焊接金屬;(乙)霓虹燈管中填入氖氣經通電後會發黃光;(丙)氦氣的密度雖大於氫氣,卻可用來填充氣球或飛船;(丁)空氣中含量最多的鈍氣是
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