For the reaction 2AgNO3 + BaCl2 ---> 2AgCl + Ba(NO3)2 ,how m

For an elementary reaction the temperature dependence of the rate constant is given by the Arrhenius equation
K(T) =νe^(-Ea/RT)
where ν is called the preexponential factor (sometimes called prefactor) and Ea the activation energy (in kJ mol^(–1)).One can also express the activation energy in joules per single molecule (a very small number),provided one replaces the gas constant,R,by Boltzmann constant,k_B.
我想知道气体常数是怎么用Boltzmann常数来取代的

We must also consider the reaction of the person ______ (receive) the gift.
receiving
为什么在这里要用-ing的形式呢?

sat2普林斯顿化学题 reaction rate can be increased by increasing the surface area of reactants
144页18题
为什么选项A不对：Ca(aq) + CO3(aq) = CaCO3(S) （不会打右上角脚标因此省略）
增大反应物面积一定要是固体和液体吗,溶液和溶液不行吗?

会做AP化学的快来帮忙
FINDING THE LIMITING REACTANT:
for the reaction below,determine the limiting reactant if 100g of FeCl3 is reacted with 50.0g of H2S:
2FeCl3(aq)+3H2S(g)→Fe2S3(s)+6HCl(aq)

who has the book 《elements of chemical reaction engineering 3th edition》auther:H.Scott Fogler
I will be very thankful if you can email it to me.my email address is :chuchangqinga@126.com

sat化学题
given the hypothetical reaction 2A+B=C+3D ,the equilibrium constant for this reaction is
I.directly proportional to the concentration of D cubed.
II,inversely proportional to the concentration of A.
III.inversely proportional to the concentration of C.
I 为什么II不对?既然与I成正比,根据公式也应该与II成反比啊.
还有个题，a catalyst act by increasing the rate of the forword reaction more than the reverse reaction.这是一个题的选项，这个选项是错误的，为什么错了？

___ a bee sting the normal reaction is redness.
A to be followed B followed C to follow D following
可否有高手解释下语法,这里选择A的原因呢?

the characters’ reaction to the musical numbers is one of unawareness,as though in their reality it is considered something completely of the norm

请帮我看看这个强调句对吗
it was laurie’s reaction when she realizes it was a surprise *** that we were intested in seeing

英语翻译
1.The rates of the forword and reverse chemical reactions are the same and the amounts of the species present do not change with time.( )2.The probability of finding the valence electrons in a given area is unequally divided between the two bonded atoms ( )3.The square root of the quantity obtained by the division of the sum of the squares of absolute deviation by the number of times of measurement.( )翻译成化学专业术语

17.specifically,how do enzymes stimulate a reaction to occur?
具体而言,酶的刺激反应是如何发生的?
A.by froming E-S complexes通过E-S的复合物
B.By having an active site通过拥有一个活化的场所
C.Because they are substrate specific底物特异性
D.By lowering activation energy requirements通过降低活化能的要求
E.By raising activation energy requirements通过提高活化能的要求
有些专业的词汇不知道翻译的对不对.

一道GRE数学题,请详解
The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present.If the concentration of chemical B is increased by 100 percent,which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?
(A) 100% decrease
(B) 50% decrease
(C) 40% decrease
(D) 40% increase
(E) 50% increase

range
reaction
impress
depress
focus
physical
contact
relax
match
presentation
powerful
conscious
introduction
encounter1.He suddenly became[1] that he was the only man who wasn't wearing a suit at the
party.
2.My sister has been really[2] since she lost her job.
3.The ages of the students in
our online school[3] from 20 to 40.
4.I remember
that when I was a child I was very[4] with how many
toys you had.
5.Although my chance[5] with this famous artist was 30 years ago,I still remember it
very well.
6.After a brief[6] by the
chairman,the speaker began her lecture on how to make a good
impression.
7.We decided to paint the doors blue to[7] the walls.
8.We are often attracted to another person
because of their[8] appearance,and sometimes because
of their ideas,opinions,and goals.
9.He[9] himself by listening to his favorite song before he addressed
the meeting.
10.In a formal interview,you should always try to maintain
good eye[10] with the interviewers.

青霉素引起的休克是：A.side reaction B.allergic reaction
A.side reaction B.allergic reaction C.after effect D.toxic reaction E.idiosyncratic reaction 是A还是C?

英语翻译
Reaction Mechanism and Kinetics of Polyacrylonitrile in the heat treatment process

英语翻译
【1】Was this the reaction his action would get from the whole world?（这里的代词比较多）
【2】Then we shall have her heroically good,heroically bad - too heroic,perhaps,to be good or bad.（句子很不正规）
【3】I'm only thingking of my pet theory about Miss Honeychruch.（pet ）
【4】For 50 years this approach has not been quite as blissful as ignorance,but it has been pretty close.
【5】Put less figuratively,well-posed physical questions elicit nonsensical answers from the unhappy amalgam of these two theories.
这些是我在SAT阅读文章里面完全无法理解的句子.
大家能不能帮我翻译看看,

Consider the following reaction.
2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ
Calculate the heat when 104.8 mL of 0.500 M HCl is mixed with 300.0 mL of 0.415 M Ba(OH)2.Assuming that the temperature of both solutions was initially 25.0°C and that the final mixture has a mass of 404.8 g and a specific heat capacity of 4.18 J/°C·g,calculate the final temperature of the mixture.
____________°C

Write a balenced ionic equation for the reaction occurring when:
(a) the addition of metallic aluminum to a copper(II) nitrate solution results in the precipitation of copper metal and the formation of aluminum ions in solution.
(b) metallic copper is added to a dilute solution of nitric acid,gaseous nitrogen(II) oxide is evolved and the solution becames a pale blue
(c) potassium permanganate solution is decolourised by acidified iron(II) sulfate solution.
(d) sulfur dioxide is bubbled through an acidified solution of dichromate ions,the latter is refuced to chromium(III) ions and the sulfur dioxide is oxidised to sulfate ions.
(e) sulfur dioxide in acid solution reduces iodate,iodate,IO3- to iodide ions and is itself oxidised to sulfate ions.
(f) when hydrogen sulfide is passed into a solution of iron(III) nitrate and a pale yellow precipitate is formed.

What‘s the product of reaction between methanol and ethanoic acid?
Is Methyl ethanoate OR Ethyl methanoate?

This produced a chain reaction,which made it possible for life to develop.句子的真正主语是?

you will be amazed by the positive reaction of some people when you say just a few words in their own language
求翻译

..
Okay so~Show the net ionic reaction equations for the neutralization of benzoic acid with potassium sulfite.Balance过后的molecular equation是:2(C6H5COOH)+K2SO3→2K(C6H5COOH)+SO3那么它的net ionic equation该怎么写呢?哪几个是spectator?Show the net ionic reaction equations for the neutralization of sodium hydrogen sulfate (acid) with lithium hydroxide.Balance过后的molecular equation是:NaHSO4+LiOH→NaOH+LiHSO4这是我写的第一步的net ionic equation…Na+HSO4+Li+OH→Na+OH+Li+HSO4我不知道对不对,但是如果对的话,那岂不4个全是spectator?那不全都给eliminate了?I don’t get it…求教下高手...本人化学不咋地...

英语翻译
Using Cu/γ-Al2O3 as catalysts the reaction affords after 24 h a mixture of cyclohexanone (I) and cyclohexanol (II) (1.4:1 ratio) in yields of 9.2 %,with a specific catalytic activity (mol products/g atom Cu) of 155.The catalyst can be reused without valuable loss of activity.Under the same reaction conditions the Cu/Fe2O3 catalyst gives cyclohexanone and cyclohexanol (1:1.5 ratio) with comparable yields (9.85 %) and a specific catalytic activity of 165.The life of this catalyst,however,is quite poor:in the second experiment (run 5) the yields dramatically decrease to 1.9 % and the catalyst turns quite inactive (run 6).The Cu/TiO2 sample is also active in the oxidation of cyclohexane to cyclohexanone and cyclohexanol with good yields (7.2 %) and high selectivity to cyclohexanone (12:1).The catalyst maintains its activity when reused,while the molar ratio cyclohexanone/cyclohexanol changes from 7.3:1 (run 8) to 3.1:1 (run 9).
The leaching of Cu from freshly prepared and recycled catalysts has been also valuated by atomic absorption analysis of the reaction mixture.The results are summarized in table 2.

英语翻译
求直译成中文名称,不是翻译意思,
1．《Novel Asymmetric Halo Aldol Reaction》报告；
2．《New OlefinicReaction Provides An Easy Approach to Diamines and Imidazolines》报告；
3．《Applicationsof Ionic Liquid Media on Nucleophilic Substitution and AminohalogenationReactions》报告；
4.《New meso-Substitutional Thienyl Porphyrins:Synthese and Spectroscopic Characterization》报告；
5.《Facile and highly efficient synthesis of a novelclass of chromene-3-yl-imidazo[1,5-a]pyridines》报告；

英语翻译
Catalyst work by providing an alternative reaction route with a lower activation energy

英语翻译
had increases their reaction and sensitivity to these "invaders".
that right off bacteria and viruses 什麽用法?that ,right ,off 分别都怎麽解释?

CAS No.8051-30-7英文品名:Coconut oil,reaction products with diethanolamine 中文品名应该是啥啊?

英语语法
我没分给啊～为什么用ing
we must also consider the reaction of the personthe gift…不是动词吗?
i was certain she would like it because iby my classmate that she loved hot food括号内的为什么这样填?

关于这个问题的答句的语法
What might have prevented a chain reaction following the initial collision?
--Had there been a more experienced driver behind the two cars.
为什么是had there.而不是there had?

英语翻译
The students' understanding of the reaction mechanisms depends on when the experiment is performed in relation to the coverage of course topics.The author and his colleagues have performed the experiment before the introduction of electro-
philic aromatic substitution or enolate halogenation in lectures.However,by the time the students' reports were due,the former topic had been discussed in the classroom,and students under-stood that the chlorination was an example of an electrophilic aromatic substitution.
Besides being used in the second-semester organic labora- tory,this experiment is also appropriate as an early experiment of an advanced or third-semester organic laboratory.Because the reactions are operationally simple,the instructor can emphasize the opportunity for students to become (re)acquainted with the hands-on operation of several instruments.In addition,the experiment reinforces the concepts of reactivity,selectivity,and spectral interpretation that were introduced in the second- semester organic course.

这些有机物都怎么称呼
14.Benzenamine,N-phenyl-,reaction,products with styrene and 2,4,4-trimethylpentene；
diphenylamine reaction product with styrene and diisobutylene; N-phenylbenzenamine reaction products with styrene and 2,4,4-trimethylpentene; reaction product of N-phenylbenzenamine,ethenylbenzene,and diisobutylene; reaction Product,benzenamine,N-phenyl- with styrene and 2,4,4-trimethylpentene；
15.2-Butanone,4-[[[1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)-1-phenanthrenyl]methyl](3-oxo-3-phenylpropyl)amino]-,[1R-(1a,4aß,10aa)]-；
"[1R-(11,4aß,10a1)]-4-[[[7-isopropyl-1,2,3,4,4a,9,10,10a-octahydro-1,4a dimethylphenanthren-
1-yl]methyl](3-oxo-3-phenylpropyl)amino] butan-2-one"
C33H45NO2
16.Amines,C18-22-tert-alkyl,(chloromethyl)phosphon ates (2:1)；monochloromethyl phosphonic acid,tert C18-22 alkyl amine salt
17.Propane,2-methyl-；
isobutane; i-butane; 1,1-dimethylethane; 2-methylpropane; A31; R-600a
C4H10
18.Butane n-butane; methylethyl methane; A-21; HC-600; R-600
C4H10
另外几个不小心发到礼仪那边去了，客人说这个是加拿大对于有害物质的禁止法案中的东东，类似于ROHS，但感觉范围还要广点。本人化学和英文水平有限，还希望请各位老师赐教。

If during a chemical reaction,a molecule loses hydrogens,it could be described as being oxidized.
ture
or
false

讲解一下该句子的句子成分,
so you can imagine the reaction when a recent USA Today investigation of air quality around the nation's schools singled out those in the smugly green village of Berkeley,Calif,as being among the worst in the country.
讲解一下这个句子的成分构成,越详细越好.

水合和水解有什么不同
看到一题如下：
The chemical reaction where water is added is known as
A.electrolysis
B.metamorphosis
C.hydrolysis
D.hydration
很奇怪为什么答案是C 是不是答案错了 顺便教一下水合（hydration）和水解（hydrolysis）有什么区别
谢谢一楼的回答,那为什么字典里说淀粉加入水形成葡萄糖（C6H10O5 + H2O = C6H12O6）也是水解?是不是字典错了（字典不是很正规的那种,电子的）

the rate of a certain reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present.if the concentration of chemical B is increased bu 100 percent,which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?

英语翻译
This report,requested by EUMEPS,concerns the reaction to fire performance of naked EPS board when tested in the SBI.The aim of the testing programme is to evaluate the effect of mounting and fixing conditions of EPS in the SBI apparatus.The influence of the nature of the substrate (calcium silicate,gypsum plasterboard,fibre cement) and the presence/absence of an air gap (no gap,25mm,80mm) between the test specimen and the backing board are studied.
The study demonstrates that both parameters (substrate and gap) influence the reaction to fire behaviour of EPS specimen (mechanically fixed).The standardised mounting (without air gap) is the preferred option since the presence of an air gap has only a minor effect on the test result and classifications but impairs the repeatability of the results and does not simplify the mounting operations.In the first part of the study,the maximum available upper Euroclasses (B) can be achieved (for the EPS sample tested) by using a particular substrate (fibre cement board).Complementary tests carried out with the standard fibre cement board (EN 13238) did not confirm this finding.The use of gypsum plasterboard as substrate would enhance the field of application of a test result because it has a lower density than standard substrates such as calcium silicate and fibre cement board and hence,covers a wider field of substrate densities.Furthermore,the testing cost would be dramatically reduced because standard gypsum plasterboard is almost 40 times cheaper than calcium silicate boards.
This report concerns the reaction to fire performance of naked expanded polystyrene (EPS) board.The testing programme has been requested and defined by the association of European Manufacturers of EPS (EUMEPS) and the tests have been carried out at the SBI Laboratory of KNAUF in France.
The harmonised European standards for reaction to fire tests are now accepted and published.They were up to finalisation at the beginning of the study.Among them the ‘Single Burning Item’ method still causes concern to the Industry,as the influence of certain parameters is not well known.
The aim of this testing programme is to evaluate the effect of mounting and fixing (M&F) conditions of EPS in the SBI apparatus.The objective is to determine a precise definition of these conditions so as to achieve a robust and reliable Euro classification.The other objectives of the programme are:
simplification of the test procedure,optimum field of extended application,reduction of testing costs.

请教二道化学题（AP）
(1)What is a reaction mechanism and how does it differ from a balanced chemical equation?
(2)Define the following general types of chemical reactions:
a.Addition;
b.Elimination;
b-1.Beta Elimination;
b-2.Alpha Elimination;
b-3.other than alpha- or beta-;
c.Displacement / Substitution;
d.Rearrangement;
e.Oxidation-Reduction.

电梯里失重的科学问题
电梯电缆断掉时,我们会感觉浮起来,用公式表达：R=normal reaction force a(acceleration)=g(gravitational acceleration) R=mg-ma =mg-mg =0 谁知道为什么第一排会变成第二排?

A common reaction in nuclear fission power plants is 235,92 U + 1,0 n -》 141,56 Ba + 92,36 Kr + 1,0 n
235,92 U = 3.90 x 10,-25kg
141,56 Ba = 2.34 x 10 -25kg
92,36 Kr = 1.53 x 10 -25kg
calcuate the energy released from this reaction in joules and MeV

英语翻译
A one-tube RT-PCR reaction was performed on a thermocycler using the Superscript One-step RT-PCR System (Invitrogen,USA) following the manufacturer’s instructions with some modifications
求翻译上段