Reaction Definition and 1000 Threads

So, semi-simple antimatter physics state that when antimatter comes in contact with regular matter, an explosion occurs. If there is only antimatter and matter in the universe, how can antimatter even exist, since it will come in contact with matter at one point and explode? So how are...

Homework Statement I'm doing report for a Thermochemistry lab and I need to calculate the molar enthalpy of formic acid, ΔH°2. Two reactions are taking place 1) H3O + OH <-> 2H2O with ΔH°1 = -58400J/mol and some q1 2) HCOOH + OH <-> H2O + HCOO and we need to calculate ΔH°2. I also know the...

Homework Statement Which has the max. value of KP- a)MgCO3(s) --> MgO(s)+CO2(g) b)CaCO3(s) --> CaO(s)+CO2(g) c)SrCO3(s) --> SrO(s)+CO2(g) d)BaCO3(s) --> BaO(s)+CO2(g) Homework Equations The Attempt at a Solution I don't understand how we could determine which has the max. Kp...

[b]1. How many liters of hydrogen gas will be produced at 280 K and 96 kPa if 1.74 of Na reacts with excess water according to the following equation. 2Na + 2H_{2}O \rightarrow2NaOH + H_{2} Im gussing I am going to have to find the number of moles of H_{2} before I can do anything...

I am kind of confused about this. What is the action and equal and opposite reaction?

It is known that if a charged particle accelerates then it emits electromagnetic wave (energy). If so then this means that the work we do on particle, W=F*s, doesn't all go to particles kinetic energy, E=0.5*m*v^2. Then this means that Newton's F=m*a doesn't hold for charged objects, particles...

1. Find the equlibrium constant if there is 0.030moles/L of Carbon Dioxide going in the forward direction and water is in excess to form Carbonic Acid (H2CO3) Homework Equations [products]/[reactants] = K The Attempt at a Solution I'm trying to figure out how Carbon Dioxide in...

Can anyone help me with this problem? Find the pH when 45.0 mL of 0.250 M NaOH(aq) is added to 35.0 mL of 0.200 M HCl(aq). I started by converting the molarities into moles but I'm having trouble with what the reaction should look like. Shouldn't it produce a salt (NaCl) and water? And...

Initial Compound is like this Ph---CO---O----CO----CH3.(Ph means phenyl) It is reacted with H3O+. What will be product? I think first attack will be at carbonyl carbon near methyl. Because phenyl ring will donate electrons to carbonyl group near it and make it less attractive towards...

tried posting in homework help, but haven't received a response would appreciate any input! original topic: https://www.physicsforums.com/showthread.php?t=584077 the problem: http://desmond.imageshack.us/Himg839/scaled.php?server=839&filename=truss1.png&res=medium i can't figure out...

When I apply a force to a wall and the force applies a contrary force, what is causing the wall to apply this force on my hand on the atomic scale?

Organic chemistry reaction Help . !URGENT! Homework Statement I can't type the O-Compounds so here's the Question http://dl.dropbox.com/u/41389643/Photo%2001-03-12%204%2047%2021%20PM%20%281%29.jpg Homework Equations The Attempt at a Solution This is the first time I came...

I have been doing some research on ozone recently, and I have a question that none of my resources have answered... The following reaction is an exothermic reaction, but how would I calculate the amount of heat energy is released? O_{3} \underbrace{\rightarrow}_{uv\ light} O_{2} + O...

Metals will react with acid to form a salt and water. But won't the metal also react with water to form an hydroxide? Similarly, when I put sodium metal into a zinc sulfate solution will displacement occur or will the sodium react with water? Thanks for the help!

Homework Statement Show that processes involving rapid chemical reactions are irreversible by considering the combustion of a natural gas (e.g. methane) and air mixture in a rigid container. Homework Equations Q_{in}+W_{e,in}-W_{b}=\Delta U+\Delta KE+ \Delta PE The Attempt at a Solution I...

Homework Statement sodium oxide plus water --> ? Is there a reaction? Homework Equations sodium oxide plus water yield sodium hydroxideThe Attempt at a Solution Na2O + H2O --> 2NaOH I don't understand whether or not there is a reaction. The problem does not give any states of matter, so how...

Homework Statement Calculate the reaction MA http://alkaspace.com/is.php?i=134123&img=E-3.1.jpg Homework Equations The Attempt at a Solution First I have put the reaction By as an hyper static force. Then I found the deflection in B with the force By as a variable. vb=...

If we use heat and a catalyst to crack water into oxygen and hydrogen, how can the efficiency of the process ever be less than 100%? Every joule that doesn't crack open the bonds and end up in the chemical energy of the products must end up as heat, and then we're back at square one. I'm...

When a more reactive metal displaces a solid metal oxide, a lot if heat is required for the reaction to occur. However, both metal and metal oxide can be solid for the reaction to take place right?

I've known about the basic story of the first nuclear pile since before I can remember, but never found information on what the associated nuclear reaction actually was and was wondering if anyone here knew or could point me in the right direction.

Why do birds get so excited and chipper when the sun shines? Shouldn't they be singing all the time? Does it have something to do with thinking spring is coming and needing to attract a mate? But then... what about when birds sing on sunny winter days?

I have just done an experiment on the clock reaction between iodine and persulfate ions. Using my experiment result, I have determined that the reaction orders are about 1.2 with respect to both persulfate and iodine ions. There is this question ' Explain why the reaction orders should be...

Homework Statement CuCl2(aq)+Al(s)→AlCl3(aq)+Cu(s) Homework Equations The Attempt at a Solution I'm just not sure what to do with a situation involving compounds. I can do simple balancing without a problem. Here is my attempt. Please, please let me know where I went wrong...

Also the chemical involve in the W and iodine. Thx

Homework Statement predict the reaction: Ca(NO3)2 (aq) + NaHCO3 (aq) -----> The Attempt at a Solution Ca(NO3)2 (aq) + NaHCO3 (aq) -----> Ca(HCO3)2 (s) + NaNO3 (aq) OR Ca(NO3)2 (aq) + NaHCO3 (aq) -----> CaCO3 (s) + NaNO3 (aq) + H20 (l) Will Ca2+ + CO32- combine, and H+...

I’m not very well versed in chemistry so am asking for help. I’m looking for a couple of safe chemicals which combine to react (or dissolve etc.) endothermically. It doesn’t have to be an impressive reaction, it just has to be safe and not produce masses of gas (so that’s carbonate/ bicarbonate...

Homework Statement -------Solution1:-----Solution2:-----Solution3:---------- Solution4:-----Solution5:--------------- Solution6: Exp. 0.200M KI-----2% starch-----0.020M Na2S2O3 -----water----0.050M acetate buffer -----0.40M H2O2...

Hi! Thanks for your interest in this this post :D! So two reactions I performed were: A) Adding 50 cm3 water to 0.025 moles CuS04 and measuring ΔT. B) Adding 50 cm3 water to 0.025 moles CuS04.5H2O and measuring ΔT. Well turns out the calculations were wrong, since I apparently didn't get...

Copper + NaCl + H20 = >> ? Does anyone have any suggestions on what chemical reaction will occur in above example? Thanks in advance for any suggestions

Hi, wondering if you could help me. I want to find a chemical reaction that would involve: Reactant + Air (or gases present within)----Exothermic----> Harmless gas Any help would be appreciated if you knew of a chemical that I could use to react with air to produce heat and a...

It seems that no matter how far and wide I look, I can find no concise explanation as to the roles of bosons in a nuclear reaction, fusion and/or fission. Thus, my inquiry: What role do bosons play in nuclear reactions, fusion and fission? What is the sequence of events that result in such a...

Need help, Activation energy determination from this reaction. Is this possible?? i did an experiment, i noted the tempreture and found rate constant. My friend did the same experiment and she found rate constant and noted the tempreture.. The tempreture differs by one degree. Can i calculate...

There is a compound 1-fluoro,1-chloro,1-bromo, propanone (a substituted ketone). If we react it with an alkali, we know alkali will attack carbonyl carbon and chloro-fluoro-bromo- methyl carbanion will be the leaving group, finally acetic acid and chloro-fluoro-bromo- methane will be formed...

My son brought home a fourth-grade science experiment a few days ago: He was to make some sort of property change in a steel nail. He had decided that he wanted to make it rust, so we set about creating an electrolyte solution out of salt and water and leaving it in there. There wasn't...

I have recently learned how to balance chemical equations using the ion electron method. However, I have some doubts.. Suppose the reaction takes place in an acidic medium; now how can we say that we are allowed to add an H+ or H2O molecule? I mean, where will these elements come from when...

Creating CH4 from H2 + CO2 This was a topic raised before. However a point that should have been made and wasn't is as follows. The problem with electricity is that it cannot be stored. Wind energy often has to be dumped at times of low demand (night, holiday periods, weekends). The amount and...

Hi, I am reading about rates of reactions, and I am confused about why we multiply the rate equation of a particular product or reactant by its respective coefficient, only taking the reciprocal of it. Could someone explain to me why this is done? Is it done merely out of convenience?

If I place a glass of white vinegar on the table, and let it make contact with air, Does anyone have any suggestions on what kind of chemical reaction has between air and vinegar? Thanks in advance for any suggestions

Hello, I have seen that adding dish soap to water and then dissolving Alka-Seltzer in the solution causes the reaction rate to slow. Does anybody have any idea as to why this happens?

Simple rigid body collision reaction (Newton III) Hi everyone! I'm writing a physics engine as part of a game I'm making. Up until this point I've implemented inter object collisions in a rather quick and dirty manner. Whenever something moves into something else, it is simply teleported back...

What reaction or series of reactions can I react SO2 gas with that will strip off the O2 and leave me with elemental S? It seems most reactions will just make a sulphates etc.

reaction of alkaline Earth metals with O2 i just got in my textbook that[FONT="Comic Sans MS"] Ba,Ca,Sr is kept in paraffin but Mg and Be are not as they form a protective coat of oxide on their surface.i don't get a clue about this .could anyone explain me this?

So, in my thermo book, it says that the gibbs free energy change of a reaction is the free energy received by the system at constant T,p and constant chemical potential when the extent of the reaction varies by one mol. The part that is confusing me is the "constant chemical...

Homework Statement Part A: Mass of Mg (s) = 0.31 g Initial temperature of calorimeter contents = 24.1 C Finial temperature of calorimeter contents = 36.8 C Part B: Mass of MgO (S) = 1.22 g Initial temperature of calorimeter contents = 24.0 C Finial temperature of calorimeter contents = 31. 9 C...

Homework Statement C3H5(NO3)3 --> N2 + CO2 + H2O + O2 Homework Equations non O and H oxi states as follows C: -2/3 to +4 N: +5 to 0 The Attempt at a Solution Oxi: C3H5(NO3)3 --> CO2 +6e- added 6 electrons to balance net carbon oxi state Red: C3H5(NO3)3 +15e- --> N2 added 15...

Good evening, everyone :) i m mathsTKK, new member od physics forum, nice to know everyone in this forum ;) I have a question regarding chemical software which can help me a lot. I am currently using Accelyrs 3.1 to do some research, but I meet some difficulties in fully using it as some of...

Homework Statement At 25 C a catalyzed solution of formic acid produces 44.6 ml of carbon monoxide gas in 30s. a) Calculate the rate of reaction with respect to CO(g) production. Homework Equations Rate = dC / dT The Attempt at a Solution dC should be expressed in mol/L but I...

Homework Statement Calculate the total kinetic energy of the products of the reaction d+C-13 --> N-14 + n if the incoming deuteron (d) has 36.3 MeV. Homework Equations Q=(Parent Mass - Daughter Mass - Decay Particle Mass)*c^2 1u = 931.5 MeV C-13 = 13.00335u N-14 = 14.003241u Neutron...

I am working on a project that needs 2 chemicals to react and change colors. The catch is they most likely need to be or come in a powder form, non toxic, and relatively inexpensive. PLEASE HELP!

Today in class my chem teacher was insistent that 2Mg + O2 = 2MgO was a synthesis reaction. this I agree with. however, he was also adamant that this was not a combustion reaction, when it our textbook it specifically gave us this very same example as a type of combustion reaction. Question: is...