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化學 高中

求解圈起來的那幾題!急!!

運動 B1 半徑 AB 元 R 吓 f R 向力 動的 察力 範例 B=0.4 1. 某溶劑X之莫耳凝固點下降常數為100℃/m把0.60克乙酸溶入50克的溶劑X中,測得凝固點下降 1.6=10X3x1.05× 1.6°C 。 1) 問乙酸在溶劑 X中是游離還是偶合? 07=0.8→不達,偶合 (2)求出游離百分率或偶合百分率。(偶合是指兩分子結合在一起的現象) 偶合 【解答】(1)偶合 (2)偶合度40% 同溫時濃度同為0.10m的下列溶液,試排出蒸氣壓的大小順序。 △PL=Cai.K T+X T=1【解答】CH3OH>C&H2O6 > CH3COOH>NaCl > Na2SO4 沸<水,蒸>水 燕皆<水 C2H5OH Na2SO4 NaCl CH3COOH C6H12O6 T=1 123 102 【稀薄食鹽水500克,測定此食鹽水的凝固點溫度為-0.134℃,試問此食鹽水濃度約為多少重量百分率? (原子量:Nq=23,Cl=35.5) 0.134 1 500 58.5 x 2 x K + 【解答】0.21% 4. 將2.9克的CaClr. 6H2O 溶於100克的水中,測得該水溶液於-4.70℃開始凝固,依此數據求氯化鈣在 水中的解離度。(原子量:Ca=40,Cl=35.5)|| 21. 【解答】90% = 。 劳 48 % 5. 240克HX(分子量120)溶於5公斤水中,若此酸有25 電離,則此溶液的凝固點若干? 【解答】-0.93℃ A Kf=5.133 2克 CoHaBr2 溶入25 克苯中,該溶液於3.74℃開始凝固,而純苯之為5.48℃。今已知乙酸在苯中有偶 合現象,而取0.965克乙酸溶入32克苯中之溶液為4.05℃,來石酸之偶合率?(Br=80) 5.28-4.05= 12 X5 XT 60 【解答】89% 品 有下列(1)~)水溶液及水: (1) 1.0m NaCl2 (2) 1.0m Na2SO4 (3) 1.0m C6H12O6 (4) 1.0m

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英文 高中

想請問第18題🥺

The pink river dolphin, also known as the Amazon river dolphin or Boto, is one of only seven species of freshwater cetaceans. Amazon river dolphins are only distantly related to saltwater dolphins. They have 16. their surroundings with larger snouts with bristle hairs on the end, especially for the purpose of river-bottom feeding. Another thing that tells them apart from their ocean-dwelling ling relative is their 17. pink 19. 18. skin. Temperature and water quality can impact the color of Amazon River dolphins. The sun's rays make them lose their pink pigmentation. So the darker the water, the pinker In addition, emotions like surprise and happiness can make them pinker, similar to blushing in humans! The Amazon river dolphins are very smart. With a brain 40% larger than that of humans, Amazon pink dolphins are said to be the most intelligent of the river dolphins. The pink river dolphins are friendly and there are plenty of stories of river dolphins saving people when they were in the water. 20., they have been valued by the tribes in the Amazon area for thousands of years.ood and B16. (A) changed into D17. (A) domestic (C) disposed of (D) resulted inside quote (B) adapted to ando (B) diligent ifoxs (C) direct (D) distinctive AD 18. (A) they will be (B) will they be (C) they do (D) they belt bica A 19. (A) capacity mis 20. (A) However (B) position (B) Moreover (C) exercise (C) Therefore (D) situation (D) Otherwise

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