reactia REVERSIBILA este : CH3-CH2-CH2-CH3 ⇄CH3-CH(CH3)-CH3
-calculez moli initiali de butan, stiind M,C4H10=58g/mol
n=m/M= 200/58mol=3,45 mol
- din ecuatie, deduc ca moli C tertiar=mol izobutan= 8x3,45/100=2,76mol, deoarece,2x3,45/100 moli au ramas netransformati
mC= nxM,C= 2,76X112g=33,12g