A 50ºC la presión de vapor de benceno es de 269,3 mm de Hg. Calcular a la misma temperatura, la presión de vapor de una disolución que contiene 1,26 gramos de naftaleno en 25 gramos de benceno.

The kinetic energy of the liquid increases. hope this !

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   

Idont know. if you want an answer you need to give us some context dude.

Not a  mixture of two common elements that can be separated by physical means.