In a chemical reaction, the reactants have a total of 27 sulfur atoms. How many sulfur atoms do the products contain?

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   

Hello.the answer is  hydrosphere, geosphere, and biosphere  have a nice day