đốt cháy hoàn toàn m(gam) photpho trong không khí thu được hợp chất điphotpho pentao oxit*(P2O5).Tính khối lượng của Photpho cần dùng dể phản ứng đủ với 3,36lít khí O2(dktc)

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   

Contained in chromosomes which are located in the nucleus of the cell.