( ( 3 -RRB- ) ( ( Ideal ( gas molecules ) ) ( ( exert ( ( neither ( ( ( an ( attractive force ) ) nor ) repulsive ) ) ( force ( on ( each other ) ) ) ) ) . ) ) )
(ROOT (S (LST (LS 3) (-RRB- -RRB-)) (NP (NNP Ideal) (NN gas) (NNS molecules)) (VP (VBP exert) (SBAR (S (NP (CC neither) (NP (DT an) (JJ attractive) (NN force)) (CC nor) (NP (NN repulsive))) (VP (VBP force) (PP (IN on) (NP (DT each) (JJ other))))))) (. .)))
3) Ideal gas molecules exert neither an attractive force nor repulsive force on each other.
(ROOT (S (NP (NP (NNS Particles)) (PP (IN in) (NP (NP (DT the) (NN gas) (NN state)) (PP (IN of) (NP (NN matter)))))) (VP (VBP do) (RB not) (VP (VB experience) (NP (NP (DT any) (NN force)) (PP (IN of) (NP (JJ mutual) (NN attraction) (CC or) (NN repulsion)))))) (. .)))
Particles in the gas state of matter do not experience any force of mutual attraction or repulsion.