Answer for Question Background Info:. is given below:
Burn hydrogen to obtain water: 
Combine them: 
Now react it with Ba: 
To sum up, the reaction is 
, using hydrogen as a catalyst..
Q.) Background Info:
Correct Answer isYou will get at first carbon dioxide by burning C: Burn hydrogen to obtain water: Combine them: Now react it with Ba: To sum up, the reaction is , using hydrogen as a catalyst.
Conclusion:
This correct answer to this statement is You will get at first carbon dioxide by burning C: Burn hydrogen to obtain water: Combine them: Now react it with Ba: To sum up, the reaction is , using hydrogen as a catalyst..