If the half-life of a chemical compound is 8.9 days, determine the first-order removal-rate constant (k).

Hairy thick gross thing? idk

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