Bonds Definition and 192 Threads

How much segma bonds are there ? http://img161.imageshack.us/img161/144/89476797ug7.png is it 19 segma bonds ?

Which of the following macromolecules are held together by covalent bonds between monomers and are synthesized through condensation reactions? Choose all correct answers. Nucleic acids Triglycerides Carbohydrates Proteins This is what I think: -Nucleic acids form...

To start off with I am only a layman in the subject, in actual fact I've just finished my GCSE year. Please forgive me if I have misinterpreted any area. To this end, my question is whether particles/molecules that are not moving are affected by gravity? Using Einstein's theory of gravity as...

My o-chem book says that phosphorus can have more than 4 covalent bonds. Why is this with respect to valence bond theory?

I have thought of two possible explanations: a) Energy required to break H bonds = Energy released when H bonds form. There is a "constant" equilibrium in the system, meaning, some water molecules form H bonds, releasing energy to the environment which causes other water molecules to loose...

Homework Statement NaCl is an ionic compound, but chlorine and silicon are joined by covalent bonds in SiCl4 A. Use Table 5.4 (page 229 of your text) to determine the electronegativity difference between chlorine and sodium, and between chlorine and silicon. What values did you calculate...

Homework Statement Write a Lewis structure for methanol (CH3OH). Based upon this structure you have drawn, and your knowledge of Lewis structures answer these three questions: A. Predict the hydrogen-to-carbon-to-hydrogen bond angle. Explain your reasoning for this prediction. B. Predict...

What touches one person ... But binds two people together ? :rolleyes: http://www.tricksandriddles.com/html/riddle_competition.html"

Hello every body.im from another country and my english is not well.please write some compounds with fourfold bonds if u can thanks :smile:

I know solid materials are formed by chemical bonds. There are crystalized or amorphous, but the bonds are fixed. How about in liquids?

Hi, what is the best method or algorithm or where could I find information for, given a certain molecule, know what bonds are not rigid ? For instance in Ph-CH2-Ph, the CH2 carbon would you consider as rigid or as flexible ? Thanks

i am doing revision for my exams aand was wondering which one of these, high temperature, hydrolysis or pH change would break the ionic bond between amino acids. I would go for pH change. I have no reason, it's just instinctively.

Homework Statement Consider a potential energy curve and system as shown in Figure C11.5. Imagine that the little atom approaches the big atom from infinity with an initial kinetic energy K=5x10-21 J. How close to the big atom does it get? a. x=0 b. x=0.04 nm c. x=0.11 nm...

Homework Statement Determine the number of covalent bonds that are possible for atoms of the following elements: silicon, bromine, nitrogen, sulphur and neonThe Attempt at a Solution OK so I know that you can find the number of possible covalent bonds by considering the electron configuration...

Homework Statement How many pi bonds are in the molecule C12H18? Homework Equations I have in my notes the formula (6nPi+2-total # of electrons)/2. The Attempt at a Solution Unfortunately I can't find an explination for this formula in the book and I don't remember what was...

From what I gather both ionic and covalent bonds transform all the elements involved into ions. Does that mean every chemical compound that exists consists of ions and not atoms or are there chemical compounds that are made of pure unionized atoms? Also when they speak of ionized water what...

Just by looking at its Lewis structure, how could you tell whether or not a molecule could have pi bonds? Thanks in advance.

Ok. It's been a long time since chemistry class. Firstly, I'm investigating alternative techniques for cutting paper. Think, a normal sheet of computer printer paper. Disregard for the moment any chemical binders. Paper is close to 100% cellulose. So, cellulose is a polysaccharide which...

as there are dienes, trienes, qua-enes, etc. allenes and what limits it or prevents it from continuing on. i.e c=c c=c=c diene c=c=c=c triene-enes (c=c=c=c=c=c=c=c)n with each end "capped" by a -CN

Do coordinate covalent bonds have to involve the sharing of a PAIR of electrons or can it just be a single electron? Example: XeF4 Now, since Xe already has a full octet, it would seem correct that the F basically shares electrons to Xe without donating any as well. This would only be true...

Are two equivalent resonance forms HCO3^- like this? ... O ...// O - C ...\ ... O - H ...O - H .../ O - C ...\\ ...O Both structures have brackets and a -. Also, each O on the left has six dots, the O on the double bond has four, and the O on the H has four as well...

Hi! This is a homework question that I'm supposed to answer but that I really do not understand. "Identify two repulsive forces and two attractive forces that influences the formation of chemical bonds between two atoms." I noticed that this question was already posted once at this website but I...

What determines the ionic nature of a bond? I am a bit confused regarding this. Is it the polarising ability of the cation or the greater electronegativity of the anion? Regarding fajan's rules, smaller the size of the cation (and greater the charge) and smaller the size of the anion, greater...

Figuring sum of double bonds and rings ?? Does anyone know how if there is a way to figure out the sum of double bonds and rings of a compound C6H9BrO ?? Lost.. thank you.

I seemed to be confuse when to use double and triple bonds. For example, take CH2O and HCN. How do you know if you can use a triple or a double bond on the carbon and oxygen for CH2O? I know the correct answer is a double bond, with two lone pairs on the oxygen. And for HCN, it is a triple bond...

Hey there, I'm trying to find some information on static friction, particularly extended theories of Amonton's. So far, I've found that Amonton said that static friction is a result of surfaces conforming to each other while not moving. I'm tyring to find recent extensions to this theory...

Hey, could anybody please explain what are delta bonds, how and why are they formed?

what's the bonding and forces that exist in a water molecule?is it ionic bond and van der waals force?

Now obviously, ionic bonds are "weaker" than covalent bonds, but my question is that according to the attached image, you can't necessarily have crystals being formed in a covelant bond as you would in an ionic bond, right? And also, when an ionic bond occurs, what makes it possible for a...

pi bonds for hybridizations, yes/no questions im having a bit if trouble with this but i need to know the number of pi bonds for the sp^3, sp^2 and sp hybridizations thanks if you can help ^^ i have another question as well,there are some questions and they have yes or no answers but I'm...

"One bond, with a face value of 1000 dollars and annual coupons at a rate of 7.2 percent effective, has a price of 1001.99 dollars. A second bond, with a face value of 1000 dollars and annual coupons at a rate of 6 percent effective, has a price of 882.83 dollars. Both bonds are redeemable at...

i'm writing a lab report of an experiment investigating strenth of hydrogen bond. An excess of cyclohexane was mixed with ethanol and there's a decrease in temperature of the mixture. I was told that upon the addition of cyclohexane, the H bonds between ethanol molecules were broken and I don't...

ok so 20 degrees celcius water, then you cool it. density increases until 4 degrees. if u cool it more, density decreases. Why is that? does it have to do with the type on polar bonds water has?

Hydrogen bonds! Hey, sorry to bother you guys with middle school stuff. I am a HS freshmen, and I got hydrogen bonds and the H20 covalent bond mixed up. What are the difference? Haha.

In ammonia, why the N atom is sp3 hybridized and not sp2 hybridized...since there are only 3 bondings... Also, in ethyne, that is H-C(triple bond)C-H...for the formation of 2 pi bonds, why it is the unhybridized 2px orbital and 2py orbital of each C atom overlap with each other? How about the...

What about the molecules and bonds of transition metals make them (such as gold) such good conductors? I'm in AP chemistry, so we may have gone over it, but I don't know right now.

In convalent bonds, when the atoms interact to form the bonds, where do the valence electrons, or clouds, exist. Do the simply loop around them in a chaotic figure eight of sorts, or do the electrons spin inbetween them? Is the realitive location of the the val. e-'s even know? And if the...

Why in organic chemistry do double bonds not allow rotation of bonds, whilst single bonds do? Thanks. :smile:

Ok someone tell me if I understand the concept correctly. Two factors determine the fluidity of the cell membrane 1) The CIS double bonds determine the fluidity of the membrane. The more cis double bonds you have, the more fluid the cell membrane will be. 2) cholesterol plays an...

I read in Cotton & Winkinson that some bonds can have 3 electrons in them. HOw is this possible?

Is it possible to transform organic matter into light, by breaking the molecular structure, then re-asssemble it into its' original form? Is it possible to transform kinetic energy into light?

Greetings. Recently, my Biology teacher was explaining about metabolism (unlike my other teachers, this one is a good teacher). He said : "catabolism produces energy on the form of ATP because it involves breaking chemical bonds". Now i feel a little confused about this. As far as i know...