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自然科學 大學

大學普化 方智化學第六題

ow Na k 7 CI o se Br Chapter 2 化學鍵結 AH -C=CH 升二技插大 3. Brigma The bond between the carbon atoms in acetylene (HCCH) consists of ) (A)6 pi electrons (B)4 pi and 2 sigma electrons (C)6 sigma electrons (D)2 pi and 4 sigma electrons (E)3 pi and 3 sigma B) B 7.(BCDE) electrons. 【84 成大化學) 14.(B) 20.(C) 4. E ) (A)NO; [83 中興A] Which of the following has a triple bond? (B)O2 (C)C12 (D)CO; (E)CN-. Which one of the following element pairs has the lowest electronegativity (B) 27.(D) 34. (C) C) 41.(CD) 1 G difference and thereby is the least polan? Få 10 323.49 B) (84 5% *ILI) -) 48. (A) 6. NET 2 > 2 D) 58. (D) 62. (B) 69. NO+ D Obind (219) O 发 (A)SeF (B)Seci (QKBr (D/NaCl (E)KAT. 11 The compound Sio does not exist as a discrete molecule while CO2 does. This can be explained because ly 2 ep 3 15 aly zp (A)the Si–O bond is unstable (B)The Lewis structure of SiO has an even number of electrons (C)The SiO2 is a solid while CO, is a gas (D)the 3p orbital of the Si has little overlap with the 2p of the 0 (E)none of the these. V MOJT 515 1 - 4 40 (成大】 Yi (4 0 atom) (86 58*A] 7. In order to explain the valence observed for many of the elements 0 -Si-O in terms of electron configurations, it is often useful to look at electronis staies slightly different from the ground state in comparing 0-41-0 the ground state of boron with the state more useful to describe 0 bonding, the number of unpaired electrons goes from (A)1 to 2 (B)1 to 3 (C)3 to 4 (D)3 to 5 (E)none of the above. (集 (80 清大B) Which of the following compounds should not exist? ( (, 【85 成大A】 alf 566-32 Cle 32-8-24 2-89 cild 14 1 he atoms 83 中興A) mm bove. B 29 p. 1 1 be a ) \CHE > ? (A)Na,P (B)(NH4),PO, CIPO. DPH xH)POCI,, Maspal sput 中興A] Pa zorgt O 15412 = 1) O-P- 5 5+12= 1) 10-4 - 13 13-12=1 -- cl-P-0

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英文 高中

請問這題的B.和C.要怎麼判斷 謝謝

第43. 至46. 題為題組 It might be hard for us to imagine having Coca-Cola as the only drink instead of fresh water. Yet, it has been the case in San Cristóbal for the past few decades. Located in southeastern Mexico, San Cristóbal, once a rainy place, can only enjoy potable water every other day. Water does trickle down from public pipes, but it's all but undrinkable, with too much chlorine. The locals find water purifiers unaffordable or even unimaginable. Hence, they end up drinking Coca-Cola, which is produced locally and far more readily available than tap water. With residents there drinking on average more than two liters of Coca-Cola on a daily basis, the real price to pay for such an alternative to plain water, however, is the sacrifice of people's physical health. Diabetes has been one of the leading causes of death, second only to heart disease, though the latter also has a lot to do with one's sugar consumption. Struggling with obesity and the many chronic diseases is now defining many local people's adolescence and adulthood. Annually, more than 3,000 lives of San Cristóbal are claimed due to their unhealthy drinking habit. The culprit, as most locals believe, is the bottling plant for Coke, a Mexico-based multinational food company owned by Femsa. The plant, with its contribution to the government's tax revenue, has long been granted daily access to more than 300,000 gallons of water in San Cristóbal to churn out the a

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