Answer:
CO2 + MgO
Explanation:
We want the number of each element on the Reactants (Left side) to be equal to the number of each element on the Product side (Right side).
The liquid will stop converting into vapor. This process is to balanced the amount of substance of both phases inside the flask.
Search ggl because we cannot add picture here.
Iodine i think. That or tellurium. Im pretty sure it's iodine