( ( The ( most ( common ( reusable ( heat pads ) ) ) ) ) ( ( contain ( ( a ( supersaturated solution ) ) ( of ( ( ( sodium acetate ) ( -LRB- ( ( 3H2O CH3COONa ) -RRB- ) ) ) ( in water ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJS most) (JJ common) (NN reusable) (NN heat) (NNS pads)) (VP (VBP contain) (NP (NP (DT a) (JJ supersaturated) (NN solution)) (PP (IN of) (NP (NP (NP (NN sodium) (NN acetate)) (PRN (-LRB- -LRB-) (NP (CD 3H2O) (NNS CH3COONa)) (-RRB- -RRB-))) (PP (IN in) (NP (NN water))))))) (. .)))
The most common reusable heat pads contain a supersaturated solution of sodium acetate (3H2O CH3COONa) in water.
(ROOT (S (NP (PRP You)) (VP (MD can) (VP (VB find) (NP (NN sodium) (NN acetate)) (PP (IN in) (NP (DT a) (NN heat) (NN pack))))) (. .)))