Identify the correct formula for beryllium phosphate. question options: be3(po4)2 be2(po4)3 be(po4)2 bepo4

It is the first one. Be is an alkali earth metal, so its charge is 2+, while phosphate has a 3- charge, making it answer 1. 

The answer is letter c

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