Are nonelectrolytes always nonpolar?
494533
No.  There are plenty - sugar is a good example - no dissociation, but nicely polar and highly soluble in water.
986647
ionic = ionic crystal\npolar-covalent = molecule with dipole bond\nnonpolar-covalent = molecule w/ no dipole bond
1080354
NaCl IS A MOLECULE CALLED TABLE SALT!\nNH3 is not a molecule because the nitrogen atom is not bonded to another atom/atoms using all of its valence electrons and is therefore not a molecule, it is an ion.
595444
they're not ions actually. they're positive and negative charges
754778
Yes, to my knowledge.  BaCl2 creates oppositly charged ends, and opposites attract, much like NaCl would do, but just a tad different.
1161789
IT could be diamagnetic according to electron configuration from Chemistry. But without specific formula I would say your best bet is e nomagnetic.
792627
True - symmetry elements cancel dipoles. Take for example CCl4, a tetrahedral molecule. Each C-Cl bond has a dipole associated with it, the negative part is the Cl (Electronegativity (EN) of C= 2.5, EN Cl =3.5). However the symmetry due to the shape of the molecule cancels out all dipole so NET dipole of molecule is zero.\n\nTrue- ex, SO4 or NO3\n\na) 180°, b) 120°, c) less than 109° (eg 104.5° for H-O-H), d) 109' 28" (or 109.5°). The detailed whys of these are due to hybridization of the atoms involved. linear will have sp hybridization and no lone pairs. trigonal planar will have sp2 with no lone pair. Bent can be many combinations, eg sp3 hybridazation with 2 lone pairs of electrons (eg water), tetrahedral will be sp3.
457736
Cationic means that a positive ion is formed, such that you have a charged ionic solution, such as salt water.  Nonionic means that you have a solution which presumably contains a detergent of some kind, like soap, but does not form an ionic solution.  Nonionic mixtures may enter hair more easily because of the lipid solubility.
363326
not chemical reations\n\nonly reflection...
705134
Refer to the reference for the structures.  The indigo is a relatively nonpolar molecule so it is insoluble in water.  The leuco form is a disodium salt and therefore soluble in water.
517387
I'm going to asume that those viatmins aren't polar, which explains why they dissolve in fats, which are also non-polar.  Likes dissolve in likes.  Polarrity has to to with the electrons being drawn to one side of a molecule, causing a slight charge on each side.  Water is polar, and will pull apart other polar molecules, but non-polar vitamins A, D, and E won't disolve in water, but instead in fats and oils.
805803
Like dissolves like...where you're looking at polarity.  Covalently bonded solutes usually dissovle in covalently bonded solvents, but not in very polar things like water.  Salts, which are ionically bonded, require very polar solvents (like water or liquid ammonia).  Polar functional groups on solute molecules mean you need similar polar groups on your solvent molecules.  Non-polar solutes like non-polar solvents.
817547
yes, they always covalently bond with each other under any normal type conditions\n\neven if you were to conveniently have an oxygen cation and anion that you combined, they would lose their ionic nature and bind in a covalent fashion
657688
because NaCl forms two ions in solution whereas ethylene glycol is a nonelectrolyte. you have to multiply the molality by two for NaCl so the change is twice as big (2 ions)
927953
Try to remember "like dissolves like".  Look at the compound that you're trying to dissolve and determine how polar it is or how "organic" it is.  Molecules with high polarity like salts or sugars will dissolve in polar solvents like water, alcohols, esters.  Molecules that are very non-polar will dissolve in non-polar solvents like benzene, hexane, petroleum ether and so on.  Solvents "in the middle" like acetone and longer-chain alcohols will dissolve the mid-range solutes but not the very polar or the very non-polar.\n\nHope this helps you.
205430
Nope. No change in the chemical composition of the molecules
912679
PCl3 has the same shape as NH3 (tetrahedral with P in the center, the 3 Cl at the 3 corners and a lone pair at the fourth corner) So the polar covalent bonds don't cancel out each other\n\nSO3 is planar trigonal and thus the dipole moments cancel out each other and it is non-polar\n\nCF4 has a tetrahedral shape and since all bonds are the same they cancel each others dipole moment;the molecule is nonpolar\n\nCH2F2 has the approximately the same shape as CF4, but since not all bonds are the same their angle is a bit different and the sum of the dipole moments is not zero; thus the molecule is polar\n\nSO2 is a bent molecule (because of the sulphur's lone pair), think of it in a way as water with S in the place of O and O in the place of H so it is polar.\n\nCO2 is a linear molecule (O=C=O) so the dipole moments of the two identical polar bonds cancel out each other; the molecule is nonpolar\n\nO=C=S has different polar bonds, so although they have opposite directions the result will be a slight dipole moment, so the molecule is polar.\n\nIn all your questions you have to compare a polar and a nonpolar molecule. Of course the one with the strongest dipole-dipole interactions in each case is the polar molecule.