What is the mass of 1.25 x 10^24 Oxygen atoms? * 1.)32.0 g
2.)1.6 x 10^23 g
3.)O 16.0g
4.)33.2 g

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   

C. definite shape, definite volume. that is a solid.