4 cars race. They are identical besides their mass as shown in the table below. Which will take the longest amount of time to accumulate to 100 mph?

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   

Ithink the answer is b.

Answertheir requirement for travel through the bloodstream.