12 yards of white 8 yards of blue and 2 yards of pink
On the right side, there are
• 2•2 = 4 atoms of Nb
• 2•5 = 10 atoms of O
so among the reactants on the left, the reaction is balanced as
4 Nb + 5 O₂ → 2 Nb₂O₅
X = 13/2 or 6 1/2. Hope this helps!
It's 10 - 4
moving decimal over to the right makes a negative exponent.
