The decomposition of ammonia to the elements is a first-order reaction with t1/2 = 200s at a certain T. How long (in seconds) will it take the partial pressure of NH3 to decrease from 0.100atm to 0.00625atm?​

4hours and 17 mins i think

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