What is the pH of a substance with 6.0 x 10-8M [H3O+]? A. 2.83
B. 4.90
C. 1.89
D. 7.22

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