Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

CO₂ + H₂O ⟶ H₂CO₃

Explanation:

1. Complete the unbalanced equation

CO₂ + H₂O ⟶ H₂CO₃

2. Put a 1 in front of the most complicated-looking formula (H₂CO₃):

CO₂ + H₂O ⟶ 1H₂CO₃

3. Balance all atoms other than H and O

Balance C

We have fixed 1 C on the right. We need 1 C on the left. Put a 1 in front of CO₂.

1CO₂ + H₂O ⟶ 1H₂CO₃

4. Balance O:

We have fixed 3 O on the right. We need 3 O on the left. We have fixed 2 O in the CO₂.  We must fix one ore O on the left. Put a 1 in front of H₂O.

1CO₂ + 1H₂O ⟶ 1H₂CO₃

Every formula now has a coefficient. The equation should be balanced.

Atom  On the left  On the right

  C               1                     1

  H               2                    2

  O               3                    3

The balanced equation is

CO₂ + H₂O ⟶ H₂CO₃

There are the same numbers of each type of atom on each side of the equation, so the Law of Conservation of Mass is obeyed.