... axit photphoric n khong 400 450oC, thu c A axit metaphotphoric (HPO3) B axit iphotphoric (H4P2O7) C axit photphor (H3PO3) D anhirit photphoric (P2O5) Cõu 157.Trong phũng thớ nghim, axit photphoric ... thng, photpho hot ng hoỏ hc mnh hn nit l : A õm in ca photpho ln hn ca nit B ỏi lc electron ca photpho ln hn ca nit C liờn kt phõn t photpho kộm bn hn phõn t nit D tớnh phi kim ca nguyờn t photpho ... thng, photpho hot ng hoỏ hc mnh hn nit l A õm in ca photpho (2,1) nh hn ca nit (3,0) B iu kin thng photpho trng thỏi rn, cũn nit trng thỏi khớ C liờn kt phõn t photpho kộm bn hn phõn t nit D photpho...