Reactions Definition and 650 Threads

Help me understand please 0.6 mole of O2, 0.8 mole of CO and 0.5 mole of CO2 are added to a 2-L container. The system is heated and 0.15 mole of CO2 is formed. Does that mean that on top of the initial 0.5 mole of CO2 an additional 0.15 mole of CO2 is formed or does that mean that in total...

Does Nitrogen (N2) react with anything?

Working a problem in Greenburgs "Advanced Eng. Mathematics", #8 page 170. Two substances w/ concentration x(t) and y(t), react to form a 3rd substance w/ concentration z(t). The reaction is governed by the system x’+ αx = 0 z’= βy x + y + z = γ solve for x(t), y(t), and Z(t) subject to...

Is there away tio reduce the smoke produced in a [combustion] reaction? Theoretically, there is no smoke produced at all (only water and carbon dioxide), but because of the impurities, imcomplete combustion, moisture, obviously, smoke is a common product of burning something. How can I...

1. I have to calculate the voltage of a standard cell with the following half-cell reactions: Ni(s) ---> Ni2+ + 2e- 2e- + Cl2(g) ---> 2Cl- 2. By the electrolysis of water, 11.2L of oxygen at STP was prepared a) What charge was required? b) If a current of 0.5A was used, how long did it...

Hello. How do we know which reaction is favored? I know that: -a primary alkyl halide favors the Sn2 -weak bases promote sn2 because they can attack sp3 carbon more easily Let's say we are given an electrophile and a nucleophile. Is there a foolproof trick which determines which...

1.How would temperature effect the rate of a reaction? Would it increase its kinetic energy thereby speeding up the reaction. Is it right in saying that as the temperature increases, the frequency of collisions increases between molecules, and the orientation changes? 2. If we have 4Fe +...

Hello, I really want to thank everyone that has helped me in understanding chemistry. I have started a few questions on rates of reactions and would love it if someone could look over my answers and see if I am headed in the right direction. 1) The rate of a simple chemical reaction like...

I'm trying to find out if there is another way to excite mercury other than temperature, say for instance what would the reaction be if a stungun was fired into a bucket of mercury, and would the result be the same if it happened in a vacuum? novice at this

I'm guessing the answer is a). I found a similar problem except if the bicarbonate was mixed with water instead. And the selections were: H3O(+), OH(-), CO3(2-), H2CO3 I think the answer to that question would be H2CO3 since it's asking for the conjugate acid which will be the form of...

1) State whether aqueous solutions of the following salts are acidic, basic, or neutral. a) NH4N03 I think this is acidic due to the hydrolysis of the NH4 ion, which produces H+ ions? b) KH2PO4 not sure about this one, since it is a diprotic acid and ionizes in more than one step any...

Some principal nuclear fusion reactions which have been considered are: 1) D + T -> n + 4He 2) D + 3He -> H + 4He 3) D + D -> H + T / 3He + n 4) T + T -> 4He + 2n 5) T + 3He -> (various products) 6) H + 11B -> 3 (4He) from G. H. Miley, H. Towner and N. Ivich, U. of...

Could anyone give me a few examples of endothermic fusion reactions between elements solid at room temperature?

Hello; thank you in advance for anyone who would like to help: I am looking for the products of these reactions: ZnSO4 + NaClO --> I thought it was just a double displacement, which would make my reaction equation: Zn(ClO)2 + Na2SO4 but a test with silver nitrate was positive for Cl-...

Hi, i woud like to ask one thing... Discuss the idea that the standard of living in a society might be measured in units of kJ/person available in that society. ...just instruct me how to do this question i mean what answer they are looking for...

Hello. Could anyone help me out with a question I'm stuck on? Thanks in advance. Calcium metal reacts with hydrochloric acid in a calorimeter and the enthalpy change is determined. Similarly, the enthalpy change for the reaction of calcium oxide with hydrochloric acid is determined. What...

Are there any endothermic reactions that can release the converted heat energy as electricty? How do they work? I wonder if it is possible to create something that will convert heat to electricty all the way down to refridgerator temps... they you got your personal power generator and a...

I'm having some trouble with getting the correct entahlpy for the rxn: NaOH + NH4Cl --> NaCl + NH3 + H2O I've gotten the net ionic to be: OH + NH4 --> NH3 +H2O individuals to be sum of products (-) sum of reactants: (-80.83+-285.84)-(-229.94 (for OH) and NH4 doesn't show anyvalue...

LIMITING reactions(please help me! (is it that hard?)NEED A CHALLENGE? hi, i was wondering if anyone could help me out with my chemistry 1 stuff. The proffessor isn't explaining it very well to me. so...well, here's the question, i need help with limiting reactions, O2 + 2No2-->2NO2, if they...

Hi ppl. I'm asked a question: Iron filings are added to a solution containing the ions Cu2+, Fe2+, Fe3+, H30+ and Zn2+. Deduce what reactions occur from the standard electrode potentials. Is this simply asking me which will change Fe2+ to Fe3+ and vice-versa by reduction or oxidation do you...

can some tell me how to write net ionic equations of acid base recations in the cases of a weak base reacts with a strong acid, a strong base reacting with a weak acid, and weak base reacting with weak acid? How do you cancel things out? Also, does NH3+HCl--->NH4Cl or NH3+HCl--->NH4+Cl-?

The directions say to give the net ionic equation for the principal reaction. I did the first couple right (I think) but don't know how to proceed: (the part by the number is the question and my answer is 2 spaces below) 1. NH4Ac(aq) + HCl(aq) -> ? H+ + AC- -> HAc 2. NH4F(s) +...

I'm having trouble keeping all these alkene reactions straight (hydroboration, oxymercuration/demurcuration, etc.) is there a useful website or an easier way to categorize/remember which reagents go with a particular reaction? My book isn't much help. Need help!

CH3OH is produced via the reaction CO(g) + 2 H2(g) -> CH3OH A mixture of 1.20 g H2 and 7.45g CO are allowed to react. What is the yield of CH3OH? [Assume theoretical yield in g is what is wanted here]

Write an equation for the reaction with an excess of H2. Give all possible isomeric products. I see the most obvious isomer adding a total of 6 H's (due to the equation) and getting rid of the double bonds but I don't understand how to get the other 3 isomers. I know that there are a total of...

I always wanted to know how the temperature inside a furnace or a reaction is measured. For eg in my textbook it is given that temperature inside a lime kiln is 1273K. how did they ever find it out? Do they have huge thermometres.

Hello, I just need some help on these questions and some explaining. I need help writing the condensed word equation for these chemical equations: A) Li + Hg(ClO)_2 \xrightarrow~Hg + LiClO Maybe: Lithium + Mercury(II) Chlorine oxide ------> Lithium Carbonate B) C_8H_1_8 + O_2...

Hello, I just need some help on these questions and some explaining. What to do: > Balance each of the following chemical equations. > Identify the type of chemical reaction (Decompostion, Combustion and Synthesis) > Write the condensed word equation A) Li + Hg(ClO)_2 \xrightarrow~Hg...

Take this double replacement reaction for example: Na_2SO_4 + CaCl_2 How am I supposed to tell whether the product will be CaSO_4 + Na_2Cl_2 or CaSO_4 + 2NaCl? Obviously, there's a difference between Calcium Sulfate + 2 Sodium Chloride molecules and Calcium Sulfate + Sodium DiChloride...

Outer shells and reactions... We say that atoms react in order to gain full outer shells - but why do they do this? Let's take water as an example - oxygen is very electronegative, so much so that when an oxygen atom collides with a hydrogen atom the outer electron of the hydrogen starts to...

Condensation reactions occur between the OH and H of C 1,4 and 6 to form polysaccharides - why do we not get reaction at C 2 or 3? ( 5 is obvious since it is not attached to H or OH ) Thanks. :smile:

Kevin Sites, the reporter present at the killing in the Fallujah mosque, has written an account of his experience that day as an 'Open Letter to Devil Dogs of the 3.1'. The Middle East scholar who goes by 'Abu Aardvark' comments on how the current absence of al-Jazeera in Iraq affects public...

general "quantities in chemical reactions" questions hi, im in high school, and we are currently doing a unit of chemistry on quantities in chemical reactions, and there are a few things i don't get, and i was wondering if anyone could show me a formula or an example, on calculating the...

I'm reviewing for a test and having a bit of trouble fully understanding the free-radical chain reactions and writing the mechanisms (initiation, propagation and termination) steps. For example, my book describes the mechanism for chlorination of methane and I just don't follow it very well...

Here's another I want to just check with you The pH of 0.01M Methylammonium chloride (not from the last thread)is lower than 7, correct? As Methylammonium is a weak base and HCl a strong acid? The pH of potassium cyanide will 7? Both KOH and HCN are very strong? And finally, the pH of...

I feel like an idiot asking this in a chemistry forum, but I have looked everywhere. I don't understand what acid and bases are, and how they work. I understand chemical bonding down to quantum physics, but I just don't understand this, what is happening in an acid?

Hi I got two questions regarding the following chemical: i) P_4 + 5O_2 -----> P_4 O_10 ii) P_4 O_10 + 6H_2O -----> 4H3 PO_4 How many grams of P_4 O_10 are formed in i) if there is 35 grams of P_4 ?? How many grams of H_3 PO_10 are formed in ii) if I have 35 grams of P_4 ...

In layman terms could you guys try to explain how a nuclear reaction works?

A Rule of Thumb: "Higher Electronegativity seeks bonding with Lower Electronegativity" Before completing my PhD in organic chemistry, with a minor in inorganic, some 20 yrs ago, I realized that the main mechanism for most organic reactions and most inorganic reactions was one of negative...

i am having problems figuring out how to resolve the moments can someone help me please Determine the reactions at "A" and "B" A is a moving support B is a fixed support please check attached file for problem

Don't know if this is even the right place for this, but reading Popular Science? i think... anyway, they mentioned the fact that if you bombard Hafnium 178 with x-ray radiation, you get about a 50-60 fold return in gamma radiation. I don't know where to classify that...nuclear reaction? but it...

KBrO2 + KI + HBr ---> KBr + I2 + H2O eq1 KBrO2 ---> KBr 4e- + 4H+ +KBrO2 ---> KBr + 2H2O eq2 2KI ---> I2 + 2K+ + 2e- 4KI ---> 2I2 + 4K+ + 4e- eq3 HBr ---> KBr K+ + HBr ---> KBr + H+ since the charges in eq3 are +1=+1 you don't have to multiply this equation by 4 do you...

I have a problem on my homework that lists several different reactions involving K mesons and asks which of them can happen via the strong interaction. I've listed a couple of them below, and I'm hoping that someone can tell me why these can or can't proceed via the strong interaction: (K-)...

i attached a picture of what it looks like. I am supposed to find the reactions at c & d, and the reactions at a & c. i think its supposed to be done using a 2 force system. i have no clue how to even start this.

LaTex help for nuclear reactions? - got it, thanks i need a guideline for to get images for nuclear equations, all my attempts thus far were failures. i tried ^4_2 He + ^27_13 Al becomes ^31_15 P becomes ^30_15 P + ^1_0 n , but it didn't work. i don't know why, nor do i have the time to...

Why are "Mg turnings" used in Grignard reactions instead of "regular" Mg? What is so special about Mg turnings?

I was just wondering, and it probably isn't a great, extreme complex question - But does alcohol contain a high or low enzyme reaction rate activity? I know that amylase is not a starch because it comes out negative for Iodine; I know that amylase is not a sugar because it tests negative for...

Looking at the table of isotopic masses table it seems that certain atoms, as 64Zn or 58Ni, could be able to capture an electron and then release a positron with an energy higher, in average, that the initial electron. On the other side, some nucleus are able to capture a positron and release...

I'm having trouble with sample AP Equation writing questions such as; solid zinc hydroxide is treated with concentrated sodium hydroxide solution. The sheet my teacher provided does not cover this reaction and many others is there any material out there that tells what will happen in most reactions

I don't know how to solve this problem... well here it goes... 33Cl(n,?)31p this is what I did... 33 (1) 31 4 17 Cl + 2(0)n -----> 15 P + 2 He Is this right ?