How do i balance these chemical equations?

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"

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   

Answer///an early form of the atomic theory; dalton atomic theory;

Ithink its called the coefficent.