C. Groups 13-16 contain metalloids.
If you look on a periodic table, these usually have a different color.
Answer: The volume of the sample after the reaction takes place is 29.25 L.
Explanation:
The given reaction equation is as follows.

So, moles of product formed are calculated as follows.
Hence, the given data is as follows.
= 0.17 mol,
= 0.255 mol
= 19.5 L, 
As the temperature and pressure are constant. Hence, formula used to calculate the volume of sample after the reaction is as follows.

Substitute the values into above formula as follows.

Thus, we can conclude that the volume of the sample after the reaction takes place is 29.25 L.
The protons and neutrons are located in the nucleus of an atom, while the electrons are located in the orbital cloud. <span />
Order.
Hope this helps! :)
Chemical, because it is breaking down the chemical and properties in the candle itself.