Answer
$C_{}H_{3}C_{}O_{}O_{}H_{}$ + 2 $O_{2}$ --> 2 $C_{}O_{2}$ + 2 $H_{2}O_{}$ .
Work Step by Step
1. Write the complete combustion of $C_{}H_{3}C_{}O_{}O_{}H_{}$ equation:
$C_{}H_{3}C_{}O_{}O_{}H_{}$ + $O_{2}$ --> $C_{}O_{2}$ + $H_{2}O_{}$ .
2. Now balance the equation, starting with the C atoms.
1 $C_{}H_{3}C_{}O_{}O_{}H_{}$ + $O_{2}$ --> 2 $C_{}O_{2}$ + $H_{2}O_{}$ .
3. Continue the process with the H atoms.
1 $C_{}H_{3}C_{}O_{}O_{}H_{}$ + $O_{2}$ --> 2 $C_{}O_{2}$ + 2 $H_{2}O_{}$ .
4. Finish the process with O atoms.
1 $C_{}H_{3}C_{}O_{}O_{}H_{}$ + 2 $O_{2}$ --> 2 $C_{}O_{2}$ + 2 $H_{2}O_{}$ .