mC2H6O(tinh)= (100% - 4,6%). 50 = 47,7(g)
=> nC2H6O= 47,7/46= 477/ 460 (mol)
PTHH: C2H6O + 3 O2 -to-> 2 CO2 + 3 H2O
nO2(cần dùg)=3. 477/460= 1431/460 (mol)
=> V(O2, cần dùng)= 1431/460 . 22,4\(\approx\) 69,383(l)
nCO2(thoát ra)= 2. 477/460 = 477/230(mol)
=> V(CO2, đktc)= 477/230 . 22,4 \(\approx\) 46,456(l)