Answer:
It is a semi circle with a triangle on top
<h2>The required balanced equation:</h2><h2>

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Explanation:
• Propane when reacts with oxygen it gives carbon dioxide and water.
- In order to make the equation balanced at both ends of the equation,
Add 4 as a coefficient before on L.H.S (Left Hand Side) of Equation.
• Therefore, the required balanced equation is:
Propane, when added with 5 molecules of Water, yields 3 molecules of Carbon Dioxide and 4 molecules of water, as shown in the below equation -

There is a change of decrease in entropy in 3Fe(s) + 202(g) -. Fe 304(g)
There is a decrease in a gaseous molecule, which causes a disorder in the system.
Your answer is: 3Fe(s) + 202(g) -. Fe304(g)
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