sat which of the following compounds is isoelectronic with co(carbon monooxyde) a.H2b.Cl2c.N2d.CO2e.NO2为什么?given the hypothetical reaction 2A+B=C+3D ,the equilibrium constant for this reaction is I.directly proportional to the concentration of

来源：学生作业帮助网编辑：作业帮时间：2024/04/28 03:48:05

sat which of the following compounds is isoelectronic with co(carbon monooxyde) a.H2b.Cl2c.N2d.CO2e.NO2为什么?given the hypothetical reaction 2A+B=C+3D ,the equilibrium constant for this reaction is I.directly proportional to the concentration of
（1）which of the following compounds is isoelectronic with co(carbon monooxyde)
题目的意思是以下的化合物有哪种是和CO（一氧化碳）等电子的?
C的电子数是6,质子数6,中子数6.相对原子质量为中子+质子=12.核外电子排布为 2：4
O的电子数是8,质子数8,中子数8.相对原子质量为中子+质子=16.核外电子排布为 2：6
所以CO的电子数是6+8=14
5个选项的电子数分别为
a,H2=2 b,Cl2=34 c,N2=14 d,CO2=22 e.NO2=23
所以答案选C
（2） given the hypothetical reaction 2A+B=C+3D ,the equilibrium constant for this reaction is
给出假设的反应方程2A+B=C+3D ,对反应的平衡常数,下列说法正确的是：
这个反应中的产物和原料的浓度都是影响反应的平衡常数的（当然在液相和气象反应中的固态物体是不影响的）题目中没有明确说明的情况下,视为全部为非固体：
具体的方程为 K=C*D^3/A^2*B
答案中 1说的是反应常数与D含量的3次方成正比.
11说的是反应常数与A含量成反比
111说的是反应常数与C含量成反比
根据平衡常数方程可以得出1是正确答案.

全部展开

楼上显然错了..CO电子数怎么可能是28？？6+8=14....
compounds is isoelectronic with co(carbon monooxyde)
意思是那个化合物是和CO等电子..
CO电子数是14
显然只有N2，也是14
H2是2 CL2是34,CO2是22，NO2是23
这道题楼上又错了..K=C*D^3/A^2*B 应该是反应物/生成物
还有，这道题不严谨..要说明ABCD都是气体才行。
这里是让你求平衡常数..
如果你已知D的立方的浓度的话，平衡常数自然正比于它...而不是问你平衡常数和什么有关。即使温度变了，平衡常数变了，那么相应的D的浓度也会改变。

收起

电子数相等

CO一共有12+16=28个electrons，并且他们是covalent bond，只有N2也是这样的，28个electrons并且是covalent bond
equilibrium constant是[A]^2[B]/[C][D]^3,虽然我认为instead of directly proportional, it should be inversely proportional, but obviously the other 2 answers are wrong

楼主你好！
第一题
所有原子的价电子数目加起来相等的两个分子、离子或者原子就是等电子体。
CO有 6 + 8 == 14 个电子。五个选项中只有 N2 有 7 + 7 == 14 个电子，故选 C。
第二题
Ka == ([C] * [D]^3) / ([A]^2 * [B])
由这个公式可以知道只有 I 是对的。
平衡常数是化学反应的特性...

全部展开

楼主你好！
第一题
所有原子的价电子数目加起来相等的两个分子、离子或者原子就是等电子体。
CO有 6 + 8 == 14 个电子。五个选项中只有 N2 有 7 + 7 == 14 个电子，故选 C。
第二题
Ka == ([C] * [D]^3) / ([A]^2 * [B])
由这个公式可以知道只有 I 是对的。
平衡常数是化学反应的特性常数，它只和温度有关，例如 Hydrogen Sulfide 在 298K 的时候的化学平衡常数就是 Ka == 5.7 * 10^(-8) 。注意这个 Ka 是在 298K 下的。
如果温度一定，那么这个化学反应在化学平衡的时候尽管ABCD的浓度会不一样，但是 Ka 是定值。
Ka 也是反应进行程度的标志，反映出反应的完全程度。反应物的K值越大，说明 product 浓度越大，reactant 浓度越小，product 转化率越大，forward reaction 趋势越强。

收起

please be aware of the fol owing.这句英语怎么翻译 lsat逻辑题.In an effort to boost sales during the summer months,which are typically the best for soft-drink sales Foamy Soda lowered its prices.In spite of this,however,the sales of Foamy Soda dropped during the summer months.　　Each of the fol SAT数学,Which of the following expressions is equal to (9x16/4y25)-2 SAT 语法~The ''Mayan Riviera'',which extends down the eastern coast of Mexico,has many hidden caves,one of which is larger (than the size of )Monaco.请问 than the size of 该怎么改? i sat on the top of the the hill,____i could enjoy the whole view of the towni sat on the top of the the hill,____i could enjoy the whole view of the townAfrom Where Bfrom Which C that D on Which 选哪个,为什么 The Official SAT Question of the SAT一道ISE题求教.in a world that the rate of technological and social change accelerates frighteningly.这里that 要改成which为什么?答案就是which 请教英语长难句For a while it looked as though the making of semiconductors,which America had invented and which sat at the heart of the new computer age,was going to be the next casualty.句子结构?which America had invented and which sat at he hurried into the lecture hall ,（in the front of which sat a professionor） who was.问答括号的句子为什么不可以写成（in the front of which sitting...）这是一题完成句子 SAT数学真题if the length of LM is 7 and the length of MN is 8,which of the following could be the length of LN(LM MN LN are vectors)ANS:14 All this data is confidential company business The company would like to be able to fol-All this data is confidential company business data.The company would like to be able to fol-low this model but not at the cost of someone being able to get to th 问一道SAT数学题Which of the following integers,when rounded to the nearest thousand,resaults in 2000A 2567B 1499C 1097D 1601E 2700 a SAT math questionon a square gameboard that is divided into n rows of n squares each ,k of these square lie along the boundry of the gameboard.which of the following is a possible value for 1025344252 SAT语法之of which用法of which的用法是什么?比如说：She likes reading newspaper,of which she likes the international news part the most.其中的of which 为什么要改成分号,即“she likes reading newspaper;she likes the internatio which引导的非限制性定语从句The building,in front of which sat a boy,was a school 但是不是说 which 引导的定语从句只能位于主句后吗?那这句话怎么插在中间了? 求这几道SAT题的答案.1.The comet has recently changed direction toward Jupiter,which is leading scientists to wonder about the composition of the object.(A) which is leading scientists to wonder about(B) this development leading scientists to 请翻译一道SAT的题If a and b are both odd intergers,which of the following can be an odd interger? Daniel is a girl next to ____I sat on the first day of school A.her B.who C.whom D.which说下为什么