( You ( ( can ( calculate ( ( the number ) ( of ( moles ( of ( ( substance ( you ( added ( with ( the buret ) ) ) ) ) ( -LRB- ( ( you ( know ( ( the ( ( volume and ) concentration ) ) ( of that ) ) ) ) -RRB- ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (MD can) (VP (VB calculate) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS moles)) (PP (IN of) (NP (NP (NN substance)) (SBAR (S (NP (PRP you)) (VP (VBD added) (PP (IN with) (NP (DT the) (NN buret)))))) (PRN (-LRB- -LRB-) (S (NP (PRP you)) (VP (VBP know) (NP (NP (DT the) (NN volume) (CC and) (NN concentration)) (PP (IN of) (NP (DT that)))))) (-RRB- -RRB-))))))))) (. .)))
You can calculate the number of moles of substance you added with the buret (you know the volume and concentration of that).
(ROOT (S (NP (NP (DT The) (NN number)) (PP (IN of) (NP (NP (NNS particles)) (PP (IN of) (NP (NP (DT a) (NN substance)) (PP (IN in) (NP (DT a) (VBN given) (NN volume)))))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (DT the) (NN concentration))))) (. .)))