You toss a coin into a wishing well and the water is denser then the coin what happens

It sinks in the water.  The reason this happens Is cause the molecules that make up the coin are much more compact then dense  in water.

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

The breaking apart of glucose, which involves spontaneous reactions