wolfson

Polar molecules as three-dimensionally "asymmetrical." This means that any molecule that has a central atom with two different types of elements connected to it is probably polar, because each atom has a different electronegativity. Bent and trigonal pyramidal molecules are always polar. The lone pair(s) on the central atom automatically make the molecule asymmetrical around the central atom. Polar molecules are also called "dipoles." Polar molecules have one end that has a partial negative ("delta negative") charge and one end with a partial positive ("delta positive") charge. The atom(s) with the highest electronegativity have a partial negative charge because a high electronegativity means that the atom is an "electron hog." The water molecule is a polar molecule. The oxygen atom is most electronegative. (ref: http://www.shs.d211.org/science/faculty/S2B/polar_molecules.htm)

As far as I know that is a MD answeing questions, so i expext him to be correct.

Dolphinlovr22, if you want you can show me all the calculations and equations you used, and i could see if there was a problem there, but the most likley is posted above. Welcome to the SFN

Look here. http://www.thehollandsentinel.net/stories/010599/fea_hecht.html

The inaccuracy is more likely to occur with salts that are fairly soluble. The reason is the assumptions made in the Ksp model (that interactions between water molecules themselves and between water molecules and ions are of roughly the same strength; that the water molecules are 100% effective in decreasing the attraction of positive ions for negative ions). In fact, especially with fairly soluble salts, ion pairs form (ion pairs are not true molecules but ions which are moving together because of the attractions of opposite charges). When Ksp is large that means that the reaction favors the dissociated. More dissolved in. When Ksp is small that means that the reaction favors the non-dissociated part of the equation. (APP 2002 & Chem 7's 2nd ed 2004)

as a general rule of thumb most inorganic compounds are writen in order of electronegativity from the most electro positive to the most electronegative An excellant description YT

yw MD

Lookat: http://id.mind.net/~zona/mstm/physics/mechanics/curvedMotion/circularMotion/introduction/circle3.html for futher infomation.

SPEED ==> The rate or a measure of the rate of motion, especially: Distance traveled divided by the time of travel. VELOCITY ==> A vector quantity whose magnitude is a body's speed and whose direction is the body's direction of motion. (APP & SES 2003 & 2002)

correct aommaster, and the metalic bonding in transition elements is due to involving the 3d electrons in the delocalisation as well as the 4s. The more electrons you can involve, the stronger the attractions tend to be.

If we know that 5 goes into a2 then we know that 5 must also be a factor of a (Can you see why?). So, we can set a = 5x for some other integer x. Therefore 5b2 = (5x)2. Can you finish it off from here?

well ill need a bit extra info, do you randomly select your horses? and What are the average odds that you pick for your horse to win at the betting office? and then i should be able to answer your question

We had a discussion about your question in a previous post, really the main thing to remember is that as the p.t. go's towards the metal section (1/2) Li K ect.... the boiling/melting point increases, the valence is labelled in numbers 1,2,3,4,5,6,7, the reactivity increase as you go down a group, i.e. G1, Li-----------Fr least reactive to most reactive, again ionization energy depends on how to lose and share (donate) electrons i.e. Li has a low first ionization energy level and He has a very high one, again this is to do with the held group situ (HMSA), but lets not get into that (a bit technical), electrical conductivity well, that increases on the left hand side of the p.t. and decreases on the right, i was in a rush when i wrote this so ignore my spelling, if you have anymore questions don’t hesitate to ask, and YT your right cap't try to be more helpful rather than being a "text book bunny" (lol).

Compound = homogeneous substance consisting of atoms or ions. Which kind of compound did you want information on?: Acids, bases, salts, oxides, organic compounds?

I.e. NaCl The sodium atom gives its outer electron Electrons are tiny, negatively charged particles that orbit the nucleus of an atom in energy levels (or shells). electron to the chlorine atom. By transferring the electron, both atoms now have electron arrangements like those of noble gases. Welcome to the SFN Albertlee (APP 2004)

Oops... mistake The points should be (sqroot5,0,0) and (-sqroot5,0,0).

Im talking about making a battery without using acid/base solutions use an iron core: Look here for more info http://www.torreypinesgulls.org/Battery.htm

can i use something else instead of H2SO4 when making batteries for example HCl or vinegar? Use pencil carbon.

As you can see marcos gets it first, and it takes him 2.5 seconds to get it, and in that time he has traveled 20m, and micheal has traveled 22.5 and the total distance between them is 45 metres ... so 45-20-22.5 = 2.5 Ans : 2.5m

D^2 = x^2 + y^2 + z^2 = y^2 + y^z + z^2 + 5 Now note that if z is non-zero then the expression (y^2 + y^z + z^2) is always greater than zero, Therefore the smallest value of D^2 (and hence D) will be when z = y = 0. Thus finding the partial derivitives of this expression w.r.t. to y and z and setting them equal to 0. Threrfore 5,0,0. Oh and note also that (-5,0,0) is also a point.

To get a percent it is: Error = experimental value - theoretical value then: Percent error = Error (what you found out above) / theoretical value * 100. And deviation = experimental value - arithmetic mean. Hope that helps.

To determine Precision you use Standard Deviation, to find the error in an average you use sumx = x1 + x2 + ... + xn, thus x = sumx/n. And there is of course systematic errors, but at your level this is not needed.

An established rule, principle, or law.

Copper with sulphuric acid as the solvent.

Linest is much more accurate.