( ( ( The ( required amount ) ) ( of ( potassium hydroxide ) ) ) ( ( is ( quickly ( ( weighed , ) ( ( protecting it ) ( as ( ( ( much ( as possible ) ) ( from ( atmospheric ( ( moisture and ) carbon ) ) ) ) dioxide ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (VBN required) (NN amount)) (PP (IN of) (NP (NN potassium) (NN hydroxide)))) (VP (VBZ is) (VP (ADVP (RB quickly)) (VBN weighed) (, ,) (S (VP (VBG protecting) (NP (PRP it)) (PP (IN as) (NP (ADJP (ADJP (RB much) (RB as) (JJ possible)) (PP (IN from) (NP (JJ atmospheric) (NN moisture) (CC and) (NN carbon)))) (NN dioxide))))))) (. .)))
The required amount of potassium hydroxide is quickly weighed, protecting it as much as possible from atmospheric moisture and carbon dioxide.
(ROOT (S (PP (IN During) (NP (DT the) (JJ early) (NN paleozoic))) (, ,) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN carbon) (NN dioxide)) (PP (IN in) (NP (DT the) (NN atmosphere)))))) (VP (VBD was) (ADJP (RB much) (JJR greater)) (PP (VBN compared) (PP (TO to) (NP (NN today))))) (. .)))