How do i calculate stoichiometry mole to mole practice problems

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

C) the increase in atmospheric pressure pushes the walls of the balloon outward thus making it  is the answer.hope i you.

B. nuclear reactions could first occur.