( ( ( The amount ) ( of ( product ( expected ( to ( be ( formed ( from ( the ( chemical equation ) ) ) ) ) ) ) ) ) ) ( ( is ( called ( the ( theoretical yield ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN amount)) (PP (IN of) (NP (NP (NN product)) (VP (VBN expected) (S (VP (TO to) (VP (VB be) (VP (VBN formed) (PP (IN from) (NP (DT the) (NN chemical) (NN equation))))))))))) (VP (VBZ is) (VP (VBN called) (NP (DT the) (JJ theoretical) (NN yield)))) (. .)))
The amount of product expected to be formed from the chemical equation is called the theoretical yield.
(ROOT (S (NP (NP (DT The) (NN amount)) (PP (IN of) (NP (NP (NN product)) (SBAR (WHNP (WDT that)) (S (VP (MD may) (VP (VB be) (VP (VBN produced) (PP (IN by) (NP (DT a) (NN reaction))) (PP (IN under) (NP (VBN specified) (NNS conditions))))))))))) (VP (VBZ is) (VP (VBN called) (NP (JJ theoretical) (NN yield)))) (. .)))
The amount of product that may be produced by a reaction under specified conditions is called theoretical yield.