( ( ( ( ( ( ( ( ( The compound ) , ) ( FeCl 3 ) ) , ) ( has ( no ( net charge ) ) ) ) , ) and ) ( one ( must ( assume ( that ( ( ( the ( positive charge ) ) ( of ( ( the ( iron ion ) ) ( in ( the compound ) ) ) ) ) ( must ( ( be ( equal ( to ( ( the ( total ( negative charge ) ) ) of ) ) ) ) ( -LRB- ( -3 -RRB- ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NN compound)) (, ,) (NP (NNP FeCl) (CD 3)) (, ,)) (VP (VBZ has) (NP (DT no) (JJ net) (NN charge)))) (, ,) (CC and) (S (NP (PRP one)) (VP (MD must) (VP (VB assume) (SBAR (IN that) (S (NP (NP (DT the) (JJ positive) (NN charge)) (PP (IN of) (NP (NP (DT the) (NN iron) (NN ion)) (PP (IN in) (NP (DT the) (NN compound)))))) (VP (MD must) (VP (VB be) (ADJP (JJ equal) (PP (TO to) (NP (NP (DT the) (JJ total) (JJ negative) (NN charge)) (PP (IN of))))) (PRN (-LRB- -LRB-) (NP (CD -3)) (-RRB- -RRB-))))))))) (. .)))
The compound, FeCl 3 , has no net charge, and one must assume that the positive charge of the iron ion in the compound must be equal to the total negative charge of (-3).
(ROOT (S (NP (JJ Iconic) (NNS compounds)) (VP (VBP have) (NP (DT a) (JJ net) (JJ neutral) (NN charge))) (. .)))