C: 4 H on the left and right, 4 O on both sides making it balanced
Use the formula stated below

So
#H_3PO_4

#Ba(OH)_2

Hence H_3PO_4 is the limiting reagent
Hydrogen gas
Explanation:
Expression:
CO₂ + H₂ → CO + H₂O
Hydrogen gas in this reaction is oxidized in the reaction.
In this manner, it is the reducing agent in the reaction.
A reducing agent is the specie in a chemical reaction that undergoes the process of oxidation.
It is marked by:
- Addition of oxygen to a specie
- Removal of hydrogen from a specie
- Loss of electron by an atom
- Increase in oxidation number
- Increase in number of electronegative atoms surrounding a specie.
Here we see that H₂ fits this criteria perfectly well.
CO₂ is the one reduced.
learn more:
Oxidizing agent brainly.com/question/5558762
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Answer:
Insulators
Explanation:
Insulators consists of air, water etc.