Question

which of these is a balanced chemical equation? a co(g) + o₂(g) → co₂(g) b co(g) + 2o₂(g) → 2co₂(g) c 2co(g) + o₂(g) → 2co₂(g) d 2co(g) + 2o₂(g) → 2co₂(g)

Explanation:

Step1: Check option A

In $CO(g)+O_2(g)
ightarrow CO_2(g)$, there are 1 carbon atom on both sides, but 3 oxygen atoms on the left - hand side and 2 oxygen atoms on the right - hand side. So it is not balanced.

Step2: Check option B

In $CO(g)+2O_2(g)
ightarrow 2CO_2(g)$, there is 1 carbon atom on the left - hand side and 2 carbon atoms on the right - hand side. So it is not balanced.

Step3: Check option C

In $2CO(g)+O_2(g)
ightarrow 2CO_2(g)$, there are 2 carbon atoms on both sides and 4 oxygen atoms on both sides. It is balanced.

Step4: Check option D

In $2CO(g)+2O_2(g)
ightarrow 2CO_2(g)$, there are 2 carbon atoms on both sides, but 6 oxygen atoms on the left - hand side and 4 oxygen atoms on the right - hand side. So it is not balanced.

Answer:

C. $2CO(g)+O_2(g)
ightarrow 2CO_2(g)$