( ( ( A unit ) ( on electrochemistry ) ) ( ( ( explores ( ( the relationship ) ( between ( ( chemical ( ( energy and ) electrical ) ) energy ) ) ) ) ( in ( ( ( both ( fuel cells ) ) and ) ( electrolytic cells ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN unit)) (PP (IN on) (NP (NN electrochemistry)))) (VP (VBZ explores) (NP (NP (DT the) (NN relationship)) (PP (IN between) (NP (UCP (NN chemical) (NN energy) (CC and) (JJ electrical)) (NN energy)))) (PP (IN in) (NP (NP (DT both) (NN fuel) (NNS cells)) (CC and) (NP (JJ electrolytic) (NNS cells))))) (. .)))
A unit on electrochemistry explores the relationship between chemical energy and electrical energy in both fuel cells and electrolytic cells.
(ROOT (S (NP (NNP Electrochemistry)) (VP (VBZ is) (NP (NP (DT the) (NN study)) (PP (IN of) (NP (NP (DT the) (NN relationship)) (PP (IN between) (NP (NN electricity) (CC and) (NN chemical) (NNS reactions))))))) (. .)))