Given the balanced chemical reaction:
2K(s) + Cl2 (g) ----> 2 KCl(s)
There are several mole ratios that can be extracted from the equation,
K/KCl = 2/2 = 1
K/Cl2 = 2/1 = 2
Cl2/KCl = 1/2
and then the reciprocal of the three mole ratios, this sums up to 6 mole ratios.