E. Calculate the number of grams of oxygen gas that are required to produce 161 grams of phosphorus trioxide.
2P + 302 → 2P03

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   

Answer///an early form of the atomic theory; dalton atomic theory;

Zinc contains about 30 protons 

Answer-ide.