問題詳情
49. 已知H的原子量為1，He的原子量為4，C的原子量為12，N的原子量為14，O的原子量為16，每一個He原子質量約為6.6×10 －24 g。今有一純物質每一個分子的質量約為5×10 －23 g，則此分子最可能為下列何者？
(A) C2H
(B) H2O
(C) NH
(D) C2H5OH
(A) C2H
(B) H2O
(C) NH
(D) C2H5OH
參考答案
答案：A
難度：適中0.435484
統計：A(27),B(8),C(12),D(6),E(0)
內容推薦
- (35-38)Colonial life, especially in the first half of the eighteenthcentury in America, was hierarch
- 關於太陽系中類地行星與類木行星的比較，下列何者正確？(A)類地行星的密度比類木行星小 (B)類地行星的體積比類木行星大(C)類地行星與類木行星的數量一樣多 (D)土星是類地行星當中離太
- (26-34)Since the end of the Second World War, themechanization of farming has been dramatic, to say
- (A) sparse (B) meager(C) intensive (D) preliminary
- She received the “Employee of the Month” award for her_____________performance on the job.(A) exe
- Assessment refers to a variety of ways used to collectinformation on a learner’s language abilit
- 一、甲公司於100年7月底向乙公司購入新北市新莊區工廠土地，並於100年8月1日完成土地產權登記。該工廠土地各種用途及面積如次：直接供工廠使用土地5,000平方公尺，行政辦公室及自用停車場1,500平
- (A) what (B) as if(C) what if (D) as
- (A) safaris (B) wildlife(C) livestock (D) poultry
- Fearing that the instructor might get angry, the pupilsbowed to him _____________.(A) obliviously
內容推薦
- Process writing as a classroom activity comprises fourbasic writing stages — planning (pre-writi
- (A) became a sign of status and thus an accomplishment(B) men over women, and whites over bla
- (A) monocultures (B) aquacultures(C) sericultures (D) piscicultures
- 在25 ℃時，甲、乙兩燒杯分別加入50 g和100 g的飽和食鹽水溶液後，各再加入10 g的水，形成兩杯未飽和食鹽水溶液。若要使其恢復為飽和食鹽水溶液，甲、乙兩杯至少各須加入X g及Y g的食
- ______________________,than she started to scream.(A) As soon as she saw the mouse,(B) She no so
- Canale and Swain (1980) propose that communicativecompetence includes grammatical competence, di
- (A) became a sign of status and thus an accomplishment(B) men over women, and whites over bla
- (A) vantage (B) downside(C) grandeur (D) agitation
- (21-25)British Airways has begun talks with airlinemanufacturers about installing anti-missile techn
- (A) became a sign of status and thus an accomplishment(B) men over women, and whites over bla
- (A) auspicious (B) dormant(C) superfluous (D) subsequent
- (39-42)For Maria Sharapova, her French Open triumph was agreater achievement than her teenage 2004 W
- (A) replenish (B) ravel(C) apply (D) withdraw
- (A) but first since she recovered from a potentiallycareer-ending shoulder injury(B) transfor
- (A) but first since she recovered from a potentiallycareer-ending shoulder injury(B) transfor
- (A) but first since she recovered from a potentiallycareer-ending shoulder injury(B) transfor
- 一、(一) 說明下列情況是否應課徵我國所得稅，若應課徵我國所得稅時，則其完稅方式為何（例如以扣繳方式或結算申報方式完稅）？（20 %）在我國境內沒有固定營業場所及營業代理人之營利事業有我國公司分
- (43-46)Now, suppose you want to predict the weather. Then, youneed two basic types of information: (
- Her driver’s license ______ for almost a year since she hit a pedestrian and got arrested for dr
- Teenagers are known to get _____ with anything they consider boring or routine.(A) sentimental (B
- Why do the predictions disagree for the computermodel?(A) The conditions at the beginning we
- People who agree with the death penalty argue that it _____ crime.(A) upgrades (B) deters (C) en
- My father wants me to be a doctor ______ my mother hopes I become a professor.(A) while (B) now
- The spruce bud worm that attacks pine trees is _____ in that area.(A) sarcastic (B) deliberate (C
- The North Pole ______ a latitude of 90 degrees north.(A) it has (B) is having (C) which is havin