AP chemistry (7)

小楼听雨20062022-10-04 11:39:542条回答

AP chemistry (7)
How many methods of physical methods of separation?
本题不是英语翻译题.

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a387623782 共回答了15个问题 | 采纳率: ennn... Basically
Separation methods (solids from liquids): filtration, centrifugation, sedimentation, freeze-drying, evaporation =D theres more like Chromatography ,distillation,decant,magnets
theres lot more... bcuz some of them are just the mixtures of it.. =D; 1年前

AP chemistry的一道题目 AP chemistry的一道题目 Step 1:N2H2O2  N2HO2- + H+ (fast equilibrium) Step 2:N2HO2-  N2O + OH- (slow) Step 3:H+ + OH-  H2O (fast) Nitramide,N2H2O2,decomposes slowly in aqueous solution.This decomposition is believed to occur according to the reaction mechanism above.The rate law for the decomposition of nitramide that is consistent with this mechanism is given by which of the following? (A) Rate= k[N2H2O2] (B) Rate= k[N2H2O2][H+] (C) Rate= k[N2H2O2]/[H+] (D) Rate= k[N2H2O2]/[N2HO2-] (E) Rate= k[N2H2O2][OH-] Answer:C 请具体讲一讲为什么选C啊? 眯眼男人1年前2: linjing0107 共回答了16个问题 | 采纳率93.8%

The rate law is determined in this case by the slowest reaction step:
rate = k[N2HO2-]
Equilibrium for step before the slowest step:
K = [N2HO2-][H+] / [N2H2O2]
K[N2H2O2] / [H+] = [N2HO2-]
rate = k{K[N2H2O2] / [H+]}
rate = (k1)[N2H2O2] / [H+]

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关于ap chemistry的一个问题 关于ap chemistry的一个问题 how would u perpare 1600mL of pH=1.50 solution using concentrated(12 M） HCL. 随便求解释一下以及解法 391991931年前1: worinimm 共回答了14个问题 | 采纳率78.6%

[H+] = 10^(-1.5) = 0.032 M
C = 0.032*1.6/12 = 0.0043 L = 4.3 mL
Take 4.3 mL 12M HCl and dissolve it to enough water to make the total volume of 1600 mL

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