題庫堂
檢索
題庫堂
首頁
數學
英文學習
政治學
統計學
經濟學
藥理學
中醫藥物學
財政學
法學知識
公共行政
警察學
BI規劃師
財務管理
公共衛生學
工程經濟學
電力電子學
當前位置:
首頁
23.有一未知的化合物只含有C和H二種元素,其分子量介於41和45之間。稱取1.4克該化合物,在充足氧氣存在下完全燃燒後,產生4.4克的CO2和1.8克的HO2,下列何者是該化合物的分子式?(原子量:
問題詳情
23.有一未知的化合物只含有C和H二種元素,其分子量介於41和45之間。稱取1.4克該化合物,在充足氧氣存在下完全燃燒後,產生4.4克的CO2和1.8克的HO2,下列何者是該化合物的分子式?(原子量:H=1.0,C=12.0,O=16.0)
(A)C3H5
(B)C
3H6
(C)C
3H7
(D)C
3H8
參考答案
答案:B
難度:
計算中
-1
書單:
沒有書單,新增
上一篇 :
【題組】80下列哪一句是本文從懷才不遇轉向待時而起的轉折之處?(A)窮且益堅,不墜青雲之志(B)所賴君子見機,達人知命(C)老當益壯,寧移白首之心?(D)舍簪笏於百齡,奉晨昏於萬里。
下一篇 :
24.下列有關硬水的敘述中,何者正確?(A)含有Na+或K+離子(B)暫時硬水可用過濾法軟化(C)永久硬水不能以離子交換樹脂軟化(D)肥皂在硬水的清潔效能比在軟水低
資訊推薦
25.有一染料溶液是混合物,將染料滴在TLC片的樣品點上,再把TLC片放置於裝有乙醇為展開液的燒杯內,進行薄層層析法的實驗,最後實驗所得到的TLC片,出現A和B位置不同顏色的色點。其中,A點與樣品點的
6.( )已知構成電路的基本要素包含電源、負載、開關、傳導體。附圖的電路中,「電線」屬於哪一要素? (A)電源 (B)負載 (C)開關 (D)傳導體
【題組】156.Which solution aims to reduce the number of cars on the road during rush hour?(A) Carpooling
【題組】157.What do Bike lanes and public bike rental systems and Park-and-ride facilities have incommon
Questions 158~160 refer to the following instant messaging conversation.Bruce: There's a new ex
【題組】159.What is Alice's response to Bruce's offer to keep her updated on interesting event
【題組】160.What can be inferred about Bruce's invitation?(A) Bruce is interested in spending time
Questions 161~163 refer to the following article.A group of technology entrepreneurs are establishin
【題組】162.How does Tandem Bank plan to offer services that traditional banks require tens ofthousands
【題組】163.What is one reason why Monzo Bank has become popular with younger customers?(A) Its capabili
Questions 164~167 refer to the following instant messaging chain.Bishop, Tina Carter, and Sophia Par
【題組】165.What is causing Sophia's anxiety?(A) She is afraid she hasn't had the chance to sh
【題組】166.What is Kelly's response to the others' concerns?(A) "We must stay optimistic
【題組】167.What is Sophia's advice to her colleagues?(A) "We need to stay focused on our goal
Questions 168~171 refer to the following letter.Dear Mayor,Congratulations on your election as the n
【題組】169.Which of the following contributions is NOT mentioned in the proposal?(A) Cycling can reduce
【題組】170.What could be potential challenges to implementing the proposed initiative?(A) Limited avail
【題組】171.What could be the long-term benefits of implementing the proposed initiative?(A) Improved pu
Questions 172~175 refer to the following news article.In a recent companywide email titled “Our comp
【題組】173.What type of laptop will Google employees who are not in engineering roles receive bydefault
【題組】174.What did Google do in response to slowing sales growth in January 2023?(A) Laid off 12,000 e
【題組】175.What changes are being made to employee desktops and workstations at Google?(A) Chromebooks
Questions 176~180 refer to the following syllabus and online comments.Staff Training Course: Communi
【題組】177.According to the syllabus, which lesson covers the importance of storytelling andemotional a
【題組】178.How can social media be used for social activism according to Lesson 4 in the syllabus?(A) B