問題詳情
40. Determine the empirical formula of polystyrene which is 92.3% C and 7.7% H. (Atomic weights:C = 12.01, H = 1.008).
(A) CH3
(B) CH2
(C) C2H
(D) C2H3
(E) CH
(A) CH3
(B) CH2
(C) C2H
(D) C2H3
(E) CH
參考答案
無參考答案
內容推薦
- What is the normality of a solution containing 49g of of H3PO4 in 2,000 mL, of solution?(A) 0.25
- Which of the following alkyl bromides will undergo the SN2 reaction the fastest?(A) Bromobenzene
- (S)(+)-Butanol shows a specific rotation at +52°. What is the ratio of (S)(+)-Butanol and (R)(-
- Which of the following statements is correct?(A) Alkenes have only sp2hybridised carbon atoms.(B
- 如圖(六),表演台前共有15排座位,其中第一排有30個,且每一排均比前一排多2個座位。若某校有1~25班,每班20人,並依下列方式安排學生入座: 依班級順序先排第一班,安排完後再排下一班。
- 圖(九)是E、F、G、H、I、J六點在菱形ABCD四邊上的位置圖,其中 將菱形分成甲、乙、丙、丁、戊、己六個平行四邊形。若 = 5 : 10 : 9, = 3 : 5,則下列哪一圖形與菱形
- 【題組】(A) to grow (B) grow (C) grows (D) growing
- 甲、乙、丙三個袋子,各裝有相同數量的球。今從甲袋取出3球放入乙袋,再從乙袋取出5球放入丙袋,此時丙袋的球數為乙袋的2倍。球三袋中共裝多少球?(A)15(B)27(C)33(D)45
- 將1~100的正整數中,除以4餘3的數,由小到大排列。若第15個數為a,第20個數為b,則b-a=?(A)11(B)15(C)16(D)20
- What is the name of the compound whose line drawing is shown below? (A) 3-ethyl-4-methyl-2-hex
內容推薦
- 【題組】Mr. Kuo has his own company. He feels tired all the time, so his doctor advises him to take
- 【題組】Ed had Christmas holiday from Wednesday to Sunday. He joined one of the trips. Which of the
- 【題組】Ruby has a five-day vacation during summer. She wants to enjoy the scenery of the east coast
- Reading 4 Taiwan High Speed Rail Timetable【題組】Sandy took a trip to Bali on February 26th. If she
- Which of the following terms best describes the pair of compound shown: (A)enantiomers (B)diastere
- ( )如下圖, 是∠BAC 的角平分線,圖中三個弧是作角平分線 的過程所留下的痕跡;我們可以利用△FAD △EAD 來說明∠CAD=∠BAD,繼而證明 是∠BAC 的角平分線。試問我們是利用尺
- Give the intermediate that is formed in the ozonolysis reaction of (E.)-2-butene.(A) (B) (C)
- 如圖(十五), 為圓O的直徑,在圓O上取異於A、B的一點C,並連接 。若想在 上取一點P,使得 P 與直線 BC 的距離等於 長,判斷下列四個作法何者正確? (A)作 的中垂線,交 於P點(B
- 【題組】According to the timetable, which direction is the train traveling in?(A) North.(B) East.(C)
- 圖(七)是△ABC與△DBE重疊的情形,其中C在 上,且 =9, =7, =6。若∠DEB=α,∠DBE=β,則∠ABD=?(A) (B) α - β(C) 180° - α - β(D) 1
- If , then =1 . (A)O(B)X
- 如圖 ( 十一 ),長方形 ABCD 中,M 為 中點,今以 B、M為圓心,分別以 長、 長為半徑畫弧,兩弧相交於 P 點。若∠PBC = 70∘,則∠MPC 的度數為何? (A) 20(B)
- 如圖(十),直線L表示地圖上的一條直線型公路,其中A、B兩點分別表示公路上第140公里處及第157公里處。若將直尺放在此地圖上,使得刻度18的位置分別對準A、B兩點,則此時刻度0的位置對
- 【題組】You’re going from Zuoying to Taipei and you want to take the last train. Which train should
- 【題組】You’re taking Train 158 from Zuoying to Taichung. How much more time will you save if you ta
- 【題組】The ticket price from Tainan to Taichung is normally $800, but if I take Train 298, how much
- 【題組】What can’t we know from the table?(A) The train ID.(B) Time for the trains to start and arri
- If ∑an is a converging series with an for any n∈N , then .(A)O(B)X
- For the following reactions the major products are shown: (A)kinetic thermodynamic(B)thermodynami
- I’ve spoken to the man in a red cap ______ times, but I still have no idea where he is from.(A) d
- It's not easy to start a business in a (an) __________ country. So they decided to buildmark
- A: After I get to Taoyuan, can you show me around?B: _______________. I’ll think about something
- I wasn’t outside the house at nine, and my parents ________.(A) was, too (B) were, too (C) wasn’t
- A: What if I fail the math test? I have to prepare for the exam tomorrow.B: ____________. Let’s
- A: How can you lift(抬起) an elephant with one hand?B: Come on. You can never find an elephant ___