2.i) Rewrite in reported speech.
“Where is your father?” asked Mr halku

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   

1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged

H tricky one let me think and get back to u