Reaction Definition and 1000 Threads

Hello I was reading a book about quantum mechanics and in some point it used as an example the reaction of the atom while its traveling through a magnetic field . So the author described an atom as a magnetic arrow ( which isn't complety right but he did that so he can reveal the truth...

For example, if I am given something like HCl and NaOH, or ##HNO_3## and ##Ba(OH)_2##. Can someone explain how I would find the net ionic reaction or provide a link to a good tutorial on how to write the equation for the total/net reaction with only the reagents/reactants?

But can be modulated by bubbles. PLOS ONE: The Influence of Bubbles on the Perception Carbonation Bite

I was trying to solve the following exercise: Choose the option that has the pair of substances whose chemical reaction is easily perceptiple a)Br2(aq) + NaCl(aq) b) Cl2(aq) + NaI(aq) c) H2(g) + MgSO4(aq) d) Ag(c) + ZnSO4(aq) e) HCl(aq) + Cu(c) I would say if the salt was an alkali...

Lets say you have the reaction aA + bB => cC + dD The rate of the reaction is given by the change in initial concentration over the change in time. -\frac{\Delta \left[ A \right]}{a\Delta T}\; =\; -\frac{\Delta \left[ B \right]}{b\Delta T}\; =\; \frac{\Delta \left[ \mbox{C} \right]}{c\Delta...

I've got a similar question to http://www.chegg.com/homework-help/questions-and-answers/pendulum-consists-10-kg-uniform-slender-rod-15-kg-sphere-pendulum-subjected-torque-m-50-n--q2722886 for homework. I applied the same steps I used on my homework question to this problem and I get a different...

Hi, As I understand it, if you have a piece of matter (hydrogen) and a piece of antimatter (anti-hydrogen) and they interact with each other they annihilate. What if your matter was Helium and your "antimatter" was anti-hydrogen? or the other way around what if your antimatter was antihelium...

Homework Statement The question is what is the product of OH\cdot and CH3NH2 The correct answer is H2O and \cdotCH2NH2 Homework Equations The Attempt at a Solution The correct answer makes sense, but I don't understand the mechanism in terms of nucleophiles and electrophiles. If...

The problem statement A uniform rod of length 2m and mass 5kg is connected to a vertical wall by a smooth hinge at A and a wire CB as shown. If a 10 Kg mass is attached to D, find: a) the tension in the wire b) the magnitude of the reaction at the hinge A. attached is my copy of the...

So it seems I've been seeing two different ways of interpreting buffer solution reactions. One to me seems to work with Le Chatelier's Principle and the other doesn't. I am dropping a strong base, NaOH, into a weak acid/base buffer solution. View A: HA + H2O <--> (H3O+) + (A-) Reasoning: The...

Homework Statement In the diagram below, work out the reaction force in each of the wheels. Note there are two wheels that make up Ra. The Attempt at a Solution 0 = 25,000*2 + 5,000*15 -5 Rb - 8,000*2 0 = 50,000 + 75,000 - 5 Rb - 16,000 0 = 109,000 - 5 Rb 5 Rb = 109,000 Rb...

In the reaction to get I2 from an aqueous solution of KI. The process. Take the aqeuous KI, and pour concentrated hydrochloric acid, followed by hydrogen peroxide. K++I-+H++Cl-+H2O\rightarrow KCl + HI + H2O The reaction with H2O2 is perplexing. I'm a physics student trying to do...

I am currently in the process of re-writing an episode for a Science Fiction television series. I have two problems. A scene at a Japanese Naval Base where I need to inflict mass casualty thru a chemical reaction that will affect only the area of the naval base itself, and wipe out all the...

I'm a bit lost. I began by the cuts but then got lost: should I introduce the reactions like Ra when writing the equations? And about the force P I should introduce, should it be equal to Rc or Vc? If anyone could give me the proper plan on how to solve this problem I will be thankful. Thank you.

Homework Statement Calculate the normal potential at 25 °C for the reaction: HA(aq) + e- → A-(aq) + 1/2H2(g) if the dissociation constant of HA is equal to 3.3*10-4 Homework Equations ΔG° = -RTlnK ⇔ -ΔG°/nF = RT/(nF)lnK ⇔ E° = RT/(nF)lnK The Attempt at a Solution Just...

I am looking to find the reaction forces on the bottom of the rectangular shape I have included (sorry for the crude diagram). I have a moment on the top right beam (390600 lb/in) and a distributed load of 160 lb/in across the entire surface of the top of the rectangular prism. I am looking...

Homework Statement For the two parallel reactions ##A \stackrel{k_1}{\rightarrow} B## and ##A \stackrel{k_2}{\rightarrow} C##, show that the activation energy ##E'## for the disappearance of ##A## is given in terms of activation energies ##E_1## and ##E_2## for the two paths by...

Action and reaction are equal and opposite. So, when mass (matter) acts on space and bends it, why doesn’t space react to this action in any detectable way?

Homework Statement can anybody explain the mechanism of the reaction C6H12O6 +CH3COCl → CHO(CHOOCCH3)4CH2OOCCH3 glucose + acetyl chloride → glucose pentaacetate Homework Equations none The Attempt at a Solution I am thinking that the CH3COCl will split as CH3C+O and Cl-...

Homework Statement Describe two considerations when building a nuclear reactor that would minimize the environmental impact of the nuclear fission reaction. Homework Equations I could think of one. is it even correct? The Attempt at a Solution The reaction needs to be kept in a...

Let's consider a stationary ball lying on the floor. The weight of the ball acts downwards and the normal reaction acts upwards. They are of the same magnitude but not of the same type. So normal reaction is the reaction to what, if not weight ?

QUESTION: Say I have the following equilibrium reaction CO+\frac{1}{2}O_2\leftrightharpoons CO_2 The stoichiometric mixture of CO and $O_2$ in a closed vessel, initially at 1 atm and 300K, is exploded. Calculate the composition of the products of combustion at 2500K and the gas pressure. Take...

Hi there, How to write the reaction between water and chromium metal under standard (i) acid and (ii) base condition? Cr + 3H2O ----> Cr(OH)3 + 3e- + 3 H+ (acid condition) basic solution ? Please help

If we want to be precise, should rate laws and corresponding ODEs correctly be expressed in terms of concentrations, or in terms of activities? In other words, are reaction rates really functions of concentrations, or of activities (which would make more logical sense) - and if the latter, why...

I do not understand how equation(3) occurs.(taken from the book Internal Combustion Engines by John B.Heywood) $$ $$ Consider a reactive mixture of ideal gases. The reactant species M_a,M_b etc.and the product species M_l,M_m etc. are related by the general reaction whose stoichiometry is...

Homework Statement A 2000kg car pushes a 1000kg garbage can at constant speed . The car exerts a force of magnitude CB on the garbage can, and the garbage can exerts a force BC on the car. Which force has greater magnitude, or are they equal? explain Homework Equations Fcb=-Fbc The...

I've attached a screenshot of the internet page where the homework questions are, which shows the problem and my answers (It says I got A right, but B and C are wrong). So I did this a few times with other tables and got the right answers, but this one is weird and the website isn't...

Given some chemical reaction, A+B -> C+D (all are ideal gases) that occures in 298K and 1 atm. why can't I automatically say that ΔH=0 for this reaction? I know that enthalpy is a state function that is dependant on temperature alone (for an ideal gas), and the final and initial temperature...

Homework Statement Balance the following equation and write the corresponding ionic and net ionic equation (if appropriate): CH_{3}COOH _{(aq)}+ KOH _{(aq)} \rightarrow Homework Equations None as far as I know. The Attempt at a Solution I wrote: CH_{3}COOH _{(aq)}+ KOH...

1) K2CrO4 is produced by the reaction of FeCr2O4 with K2CO3 and O2 in a high temperature. This reaction also produces Fe2O3 and CO2. If 169 kg FeCr2O4 reacts with 298 kg K2CO3 and 75 kg O2 and so it produces 194kg K2CrO4 then calculate the efficiency of this reaction.2) The equations is: 4...

I understand the Gibbs Free Energy equation that was drilled into us in Chemistry class but not even my teacher could explain what entropy had to do with free energy, and furthermore, why entropy is a driving force for a reaction. From what I understand, entropy is the distribution of energy...

Homework Statement Establish K at 298K for the reaction: 2N2O4 (g) + O2 (g) → 2N2O5 (g)Homework Equations ΔG° = -RTlnK The Attempt at a Solution I've established that ΔG° = 34.4 kJ/mol (Correct) but for some reason when I solve for: K = eΔG°/-RT K = e34.5/(-(8.314)(298)) = .98495 I get...

Homework Statement Pt l H2 (1atm) l HBr (1x10-4M) ll CuBr l Cu = 0.599 V at 298K i) determine the overall cell reation and calculate the Ksp of CuBr at 298K ii) What would be the effect on EMF if pressure of H2 increases from 1atm to 2atm. Why? Homework Equations CuBr = Cu+ x Br-...

Homework Statement Fermions and bosons combine through the reaction F + F + ΔE = B (so the creation of a single boson requires 2 fermions and some positive energy). What is the ratio of fermions to bosons at T = 0? Homework Equations 2[nF]/[nB] = K(T), where [nF] is the...

Hi I want to define an Am-Be source in MCNPX 2.6 But I don't have Gamma spectra of this source. Is there any computer code that can simulate (Alpha,Gamma) reaction? Please Help!

Homework Statement Determine the reaction force from water flowing through a clean 0.02cm (Diamater assumed) hole in tank depth 3m Homework Equations P = rho.g.h A = Pi.R^2 P=F/A The Attempt at a Solution P = rho.g.h = 29400 Pa A = Pi.R^2 = 0.00031415 m^2 P = F/A -> F = PA =...

Homework Statement Write the equation for the esterification reaction for acetic acid and ethyl alcohol to form ethyl acetate. • Circle the acid functional group and underline the acidic hydrogen. • Circle the alcohol functional group • Circle the ester functional group. The...

Homework Statement Which of the following combinations (in water) causes a reaction? Write a balanced reaction equation for the cases that cause reaction: CU2+ + H2(g) Fe2+ + AG Fe3+ + Sn2+ etc... Homework Equations Not applicable. The Attempt at a Solution I've...

Can Anybody help to code this in matlab A->B --- A is Sbbstrate here and B is Product Y[b][/a]=stiochimetric Initial values are A[0] and B[0] Q= reaction quotient R=active if Q<k ----- R is reaction R=Stops if Q=k t=...

There seems to be a problem with radiation reaction force. Let's look at charged sphere, attached on a rod to an object with larger mass, and rotating around its centre together with it. The rotating charged sphere emits radiation with power P. The sphere's speed is V. Assuming energy is...

Hi, Im stuck: I found this example in which they calculate the rate of reaction: the title is "calculating the average reaction rate" Now how the hell is this average reaction rate if they didnt use stoichiometric coefficients!? (in this case it should be 2. Thanks in advance.

Homework Statement will it have a reaction? Homework Equations Equation: Pb(NO3)2 + Cu --->? The Attempt at a Solution Pb(NO3)2 + Cu ---> Pb(NO3)2 + Cu ------ Cu(NO3)2 + Pb

I was working on a synthetic problem involving the abiotic synthesis of amino acids (not a homework question). It has been proposed that, in early Earth conditions, DAMN (diaminomaleonitrile) catalyzes the formation of dipeptides -- in this case gly-gly. However, it has been found that only a...

Homework Statement Number 8 is the one I was unsure of in my exam. I know a hydride shift would give it a better carbocation, however it was not tetra hedral, so I panicked, and quickly did a alkyl shift, it worked out on the exam, but I was on the verge of running out of time so I...

Homework Statement Can somebody help me balance this redox reaction using either the redox number method or the half equation method? Thank You Na2S + Ag + HNO3 + Na2CrO4 ----> Ag2S + Cr(NO3)3 + NaNO3 Can you please explain your steps. Thank YouHomework Equations The Attempt at a Solution I...

Burning a 3.230 g sample of the unknown compound in an excess of oxygen produces 4.7341 g of CO2 (carbon dioxide). The carbon initially in the unknown compound is completely converted to carbon in the CO2. If it is determined that the molecular weight of the unknown compound is 180.16 g/mol...

Homework Statement given: 2 H3PO4 + 3 Mg(OH)2 + 1427 kj → 6 H20 + Mg3(PO4)2 How much heat is involved if 927 grams of Mg(OH)2 reacts? Homework Equations The Attempt at a Solution 927 g x Mg(OH)2 mole/56.305g x 1427 kj/3Mg(OH)2 mole = 70,482 kj I just felt like I...

Homework Statement (2S,3S)-2-chloro-3-methylpentane + high concentration of CH3O- ---> ? The Attempt at a Solution I need to find the product and usually my method is to knock off the -Cl replacing it by -OCH3 and when drawing the compound I just make an mirror image. In...

Homework Statement I´ll show it with a picture: Homework Equations Static equilibrium, Sum Forces=0 ; Sum Moments= 0 The Attempt at a Solution With the Fx, and Fy equations I can calculate the reactions Rx and Ry but I don´t understand the moments equation: Sum M around...

Funny or ouch?? So you come across some modern slapstick clips like this: for instance. You see bloopers, people crashing in various forms into solid objects. What's your honest first reaction? I went for 'ouch'. Can't see any humor into people getting hurt. Thoughts?