Răspunsuri

2014-09-18T20:40:33+03:00
C2H6 + 7/2 O2 ---> 2 CO2 + 3 H2O
V aer = 5 * V oxigen => V oxigen = 500/5 = 100 ml
22.4 l C2H6.........7/2 * 22,4 l O2
20 ml C2H6................x l O2           x = 70 ml O2
V exces = 100 - 70 = 30 ml deci raspunsul C