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

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satwhichofthefollowingcompoundsisisoelectronicwithco(carbonmonooxyde)a.H2b.Cl2c.N2d.CO2e.NO2为什么?give

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.

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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。

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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...

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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。

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