Answer:
C) 2C2H6 + 7O2 → 4CO2 + 6H2O
Step-by-step explanation:
this way the number of each type of atom is balanced on each side of the equation
on the left we have:
2x2=4 C
2x6=12 H
7x2=14 O
and on the right we have:
4x1=4 C
(4x2=8)+(6x1=6)=14 O
6x2=12 H