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19. 將氖氣置於具有可移動活塞的容器中(假設活塞重量及摩擦力皆可忽略),定壓下當氣體溫度從 20.0 °C 上升至 40.0 °C 時,此時氖氣的密度變化為何?(A) 降低少於 10% (B) 降低
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19. 將氖氣置於具有可移動活塞的容器中(假設活塞重量及摩擦力皆可忽略),定壓下當氣體溫度從 20.0 °C 上升至 40.0 °C 時,此時氖氣的密度變化為何?
(A) 降低少於 10%
(B) 降低大於 10%
(C) 增加少於 10%
(D) 增加大於 10%
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18. 下列四種分子,鍵角大小由大到小的順序何者正確?(I) NH3 (II) H2S (III) O3 (IV) H2O(A) I > III > II > IV (B) II > I > III
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20. 假如金屬 X 是比金屬 Y 強的還原劑,則下列敘述何者正確?(A) X+是比 Y+強的氧化劑 (B) X+是比 Y+強的還原劑(C) Y+是比 X+強的還原劑 (D) Y+是比 X+強的氧化劑
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