How is the density of an irregular object found

It is found by measuring how much water you first put in their best way is with a graduated cylinder then put in your object and see how much the water went up by.

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