Question

C8H18 + O2→ CO2 + H2O

Answer 1

The balanced equation is
`2C_(8) H_(18) + 25O_(2) ---> 16CO_(2) + 18H_(2) O`

Step-by-step explanation:

We begin by balancing the C and the H atoms first,

`C_(8) H_(18) + O_(2) ---> 8CO_(2) + 9H_(2) O`

Now, counting the number of O atoms on either side;

reactant side ---> 2

product side ----> 25

So,
`C_(8) H_(18) + (25)/(2) O_(2) ---> 8CO_(2) + 9H_(2) O`

⇒
`2C_(8) H_(18) + 25O_(2) ---> 16CO_(2) + 18H_(2) O`