( ( ( Percent ( composition ( Understandings ( and ( Fundamental Concepts ) ) ) ) ) ( ( ( The percent ) ( by ( mass ( of ( ( an element ) ( in ( a compound ) ) ) ) ) ) ) ( can ( be ( calculated ( from ( ( the ratio ) ( of ( ( the mass ) ( of ( that element ) ) ) ) ) ) ) ) ) ) ) ( ( ( represented ( in ( the formula ) ) ) ( to ( ( the ( formula mass ) ) ( of ( the compound ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Percent) (NNP composition) (NNPS Understandings) (CC and) (JJ Fundamental) (NNP Concepts)) (SBAR (S (NP (NP (DT The) (NN percent)) (PP (IN by) (NP (NP (NN mass)) (PP (IN of) (NP (NP (DT an) (NN element)) (PP (IN in) (NP (DT a) (NN compound)))))))) (VP (MD can) (VP (VB be) (VP (VBN calculated) (PP (IN from) (NP (NP (DT the) (NN ratio)) (PP (IN of) (NP (NP (DT the) (NN mass)) (PP (IN of) (NP (DT that) (NN element))))))))))))) (VP (VBD represented) (PP (IN in) (NP (DT the) (NN formula))) (PP (TO to) (NP (NP (DT the) (NN formula) (NN mass)) (PP (IN of) (NP (DT the) (NN compound)))))) (. .)))
Percent composition Understandings and Fundamental Concepts The percent by mass of an element in a compound can be calculated from the ratio of the mass of that element represented in the formula to the formula mass of the compound.
(ROOT (S (NP (DT The) (NN term) (NN percent) (NN composition)) (VP (VBZ means) (NP (DT the) (NN percentage)) (PP (IN by) (NP (NP (NN mass)) (PP (IN of) (NP (NP (DT each) (NN element)) (PP (IN in) (NP (DT a) (NN compound)))))))) (. .)))