The answer is given but I'd like to understand how one would get to the answer.

Find the limiting reactant.

Explanation:

Using the ratio in the chemical formula, find the limiting reactant.

The second equation results in less mol of MnO₃, therefore it is the limiting reactant and changing the moles of O₂ to moles of MnO₃ which will give the theoretical yield which is 1.55 mol MnO₃.

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .

the product of the pressure and volume is also constant