When two or more substances are mixed together without undergoing a chemical reaction, it results in a/an?

The observable signs when a chemical reaction has occurred are either of the following:

*formation of precipitate
*formation of gas
*change in color

Otherwise, it is just a physical change. When these two substances are mixed together, it results in a mixture. If these two substances are soluble with each other, then the mixture is specifically called a solution.

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.