<span>A chain reaction keeps going on its own once started</span>
I think it's 10 but i may not be right so, sorry if it's wrong lol
Heat the water on an oven burner or place it in sunlight for several days to evaporate the water out of the pan. Allow the water to evaporate away and you will be left with the food coloring remaining in the pan.
22.4L.
This is because the standard conversion factor for Liters is 22.4 and in the question it explicitly states liters of CO2.
Therefore, in order to convert Liters of CO2 to Moles of CO2, you'd need to use the conversion factor of 22.4.
Hope this helps!