why are water molecules sticky????
820429
Hydrogens in water have a small positive charge, and oxygen molecules have a small negative charge...this is due to the higher electronegativity of oxygen compared to hydrogen...\n\nThis results in attraction of the positive and negative charges of different water molecules, resulting in what is called hydrogen bonds
673911
If you could shrink 'way down and look at a single water molecule, you\nwould find that it is made of two hydrogen atoms and one oxygen atom.\nThey are arranged in a V-shape, with the oxygen at the point.  The result\nof this shape is that there is more negative charge at one end of the\nmolecule than the other (oxygen likes to have negative charge).  We call \nthis a POLAR molecule.\n\nOther polar molecules like salt and sugar and Kool-aid will dissolve in\nwater because the water molecule will be attracted to their charged ends.\nThe water molecule likes their charges so much that it will actually\nsurround the salt or sugar molecules, so that each one looks like a ball\nof water molecules.  We call this SOLVATION.  Since the salt molecule\nis surrounded now by water, it can't stick to other salt molecules, so\nit just sort of floats away.
1041638
The moisture in the "glue" must evapourate before it can bond.  The inside of the container is not airtight, however there is insufficient air and heat to facillitate evaporation.  Hence, the "glue" is kept in liquid or solid (as in the case of a glue stick) form.  Also, the containers are plastic which doesnt have high affinitiy for many chemicals, further reducing bonding.
243894
Hydrogen bonding causes water to expand upon freezing.  The H-bonds cause the molecules to align into a structure that occupies more space than the liquid.  \n\nLiquid H2O does not do this because the kinetic energy of the water molecules constantly breaks any H-bonds that form.  As the kinetic energy (temperature) of the water decreases, the water becomes more dense, down to about 4 deg. C.  \n\nBelow 4 deg. C, the H-bond alignment of molecules outweighs the kinetic energy and the density of water begins decreasing.\n\nFrom Wikipedia:\nA simple but environmentally important and unique property of water is that its common solid form, ice, floats on the liquid. This solid phase is less dense than liquid water, due to the geometry of the strong hydrogen bonds which are formed only at lower temperatures. For almost all other substances and for all other 11 uncommon phases of water ice except ice-XI, the solid form is more dense than the liquid form. Fresh water is most dense at 4°C, and will sink by convection as it cools to that temperature, and if it becomes colder it will rise instead. This reversal will cause deep water to remain warmer than shallower freezing water, so that ice in a body of water will form first at the surface and progress downward, while the majority of the water underneath will hold a constant 4°C. This effectively insulates a lake floor from the cold.
323024
All fluids are viscous.  Some are more so than others, and that has to do with how the fluid interacts with itself on a molecular level.
1183305
Because water (H2O) is a polar substance... meaning that the molecules are balanced... positives and negatives.\nOil, on the other hand, is a non-polar substance.\n\nIf you follow the theory of "like dissolves like", a non-polar solute (oil) would NOT dissolve in a polar solvent (H2O).\n\nSo... they don't dissolve in each other... they just kind of sit on top of each other.\n\nI hope that made sense!
952829
In all molecules, there is a type of chemical energy called "enthalpy", it is the energy stored in bonds.  Think of it this way, all particles want to be free and in motion, in complete disorder, thats the "entropic" nature of the universe.  So, it takes energy to make particles stick together (forming compounds and molecules).  This energy is stored in bonds, and when the bonds are broken, the energy is released.  Our cells have the ability to break these bonds, and utilize this energy.\n\nThink of it this way, glucose is C6H12O6.  Our cells can break down all of the bonds in glucose until we form a few CO2 and water molecules.  Thats how we get our energy.
714401
LOL!\n\nLet's guess which types of molecules your homework listed.\n\nI will guess...  A water molecule.
956746
One water molecule consists of two Hydrogen atoms and one Oxygen atom.\n\nSet yourself up an experiment.\nYou need a known weight (mass) of a compound that will absorb water and water moisture.  When breathing out, let the expired air pass into the same environment as the absorbing compound.  Do this a number of times.  Then reweigh the absorbing compound.  The gain in mass of the absorbing compound will be due to he water in the expired air.
82769
Specifically the intermolucular forces make up surface tension in water are hydrogen bonds.  A hydrogen bond is a noncovalent interaction between two polar molecules.  In this case one molecule of water lines up with another as shown here:  H2O - HOH.  Where the "-" is indicating an interaction between the relatively postive hydrogen on the right molecule and the negative lone pair of electrons on the oxygen of the left molecule.  As each molecule has two hydrogen atoms and two lone pairs of electrons on the oxygen, each is capable of participating in four separate hydrogen bonds.
294136
because they are sticky
1051142
because water molecules are heavier than air molecules.  If you think about it, these heavy molecules are weighing down (even though they are suspended) on everything around them  with more force (which is proportional to the mass).
745249
the molecules in the uppermost layer of a liquid,taken in cup/jar shares their bonds to make the surface hard to pierce with light forces.\neg: if you put a blade in a cup of water,it will float on its surface.It is due to the Surface tension.
596688
Becaue water is polar and water molecules form hydrogen bonds with each other.
804947
In many ways, water is a miracle liquid. It is essential for all living things (on this planet at least), and it is often referred to as a universal solvent because many substances dissolve in it. These unique properties of water result from the ways in which individual H2O molecules interact with each other.\n\n The partial charge that develops across the water molecule helps make it an excellent solvent. Water dissolves many substances by surrounding charged particles and "pulling" them into solution. For example, common table salt, sodium chloride, is an ionic substance that contains alternating sodium and chlorine ions.\n\nWhen table salt is added to water, the partial charges on the water molecule are attracted to the Na+ and Cl- ions.  The water molecules work their way into the crystal structure and between the individual ions, surrounding them and slowly dissolving the salt.  The water molecules will actually line up differently depending on which ions are being pulled into solution.  The negative oxygen ends of water molecules will surround the positive sodium ions; the positive hydrogen ends will surround the negative chlorine ions.  \n\nIn a similar fashion, any substance that carries a net electrical charge, including both ionic compounds and polar covalent molecules (those that have a dipole), can dissolve in water. This idea also explains why some substances do not dissolve in water. Oil, for example, is a nonpolar molecule. Because there is no net electrical charge across an oil molecule, it is not attracted to water molecules and therefore does not dissolve in water.
234734
firstly, a water molecule,H2O, is a polar covalent compound.or, the oxygen and the 2 hydrogen atoms have a difference in their electronegativities.\n\nthis results in the oxygen atom pulling the shared electrons towards itself.since electrons are negatively charged, a polarity is developed between the atoms. the oxygen atom has a slight negative charge while the 2 hydrogen atoms have slight positive charges. \n\nsince opposite charges attract, this will obviously result in the oxygen atom of one molecule to be attracted to a hydrogen atom of another molecule and vice versa.\n\nwhen water is in the liquid state, the molecules have a lot of kinetic energy, and because the charges are so slight, the molecules have enough energy to overcome a fixed sorta bond between them.many H atoms are attached to one 0 atom, and this results in more density.\n\nwhen in solid state, or ice, the molecules have lost their kinetic energy and hydrogen bonding comes into the picture. since a water molecule is a V kinda shape, and two ends are H atoms, a lot of space is required to get a complete, closed link of water molecules.so, many clumps of '0' shaped 'links' like this are formed.\n\nsince the water molecules have spread out so much in the solid state[due to hydrogen bonding] ice occupies more spce than liquid water.
327842
I am pretty sure that it is due to polarity.  Since sulfur forms nonpolar S8 molecules, they are nonpolar, where water has a + end and a -end, making it polar (has a dipole moment).  The general rule is like dissolves like.  Molecules that a alike can interact on  the molecular level and form solutions, unlike molecules can not.