<u>Answer:</u> The moles of carbon dioxide formed in the reaction is 20 moles.
<u>Explanation:</u>
We are given:
Number of moles of butane = 5.0 moles
The chemical reaction for the combustion of butane follows the equation:

As, oxygen is present in excess. So, it is considered as an excess reagent.
Thus, butane is considered as a limiting reagent because it limits the formation of products.
By stoichiometry of the reaction:
2 moles of butane produces 8 moles of carbon dioxide.
So, 5 moles of butane will produce =
of carbon dioxide.
Hence, the moles of carbon dioxide formed in the reaction is 20 moles.
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It would be neutron because protons have a positive charge, electrons are not in found in the nucleus of an atom, orbital doesn't have any thing to do with a nucleus of an atom, and a nucleus can't be found in a nucleus