Question

Background Info:

Answer 1

Answer:

You will get at first carbon dioxide by burning C:

C+O_2=CO_2

Burn hydrogen to obtain water:

H_2+\frac{1}{2}O_2=H_2O

Combine them:

CO_2+H_2O=H_2CO_3

Now react it with Ba:

Ba+H_2CO_3=BaCO_3+H_2

To sum up, the reaction is Ba+C+\frac{3}{2}O_2=BaCO_3, using hydrogen as a catalyst.

Explanation:

Answer 2

You will get at first carbon dioxide by burning C:
$C+O_2=CO_2$
Burn hydrogen to obtain water:
$H_2+\frac{1}{2}O_2=H_2O$
Combine them:
$CO_2+H_2O=H_2CO_3$
Now react it with Ba:
$Ba+H_2CO_3=BaCO_3+H_2$
To sum up, the reaction is $Ba+C+\frac{3}{2}O_2=BaCO_3$, using hydrogen as a catalyst.