Balancing Chemical Reaction Equations│Please Help!

Question

Drag and drop the coefficients to balance this equation:

___C₆H₆ + ___O₂ ==> ___CO₂ + ___H₂O

Answer Box:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

Answer 1

1.‎ balance this equation

___C₆H₆ + ___O₂ ==> ___CO₂ + ___H₂O

Here's a reasonable approach:

1. Balance C and H by adding coefficients 6 for CO₂ and 3 for H₂O

___C₆H₆ + ___O₂ ==> 6 CO₂ + 3 H₂O

2. Count total O atoms on the right (15) and put half that number (7.5)

as the coefficient for O₂. This gives the balanced equation

C₆H₆ + 7.5 O₂ ==> 6 CO₂ + 3 H₂O

3. Since 7.5 is not in the answer box, it appears that you're required to have all coefficients be integers. So you double all coefficients found in step 2

This gives the new balanced equation

2 C₆H₆ + 15 O₂ ==> 12 CO₂ + 6 H₂O