What is the molar ratio of #Li# to #N_2# in the reaction #6Li + N_2 -> 2Li_3N#?
It's a 6:1 ratio.
When determining the molar ratio of two or more species, you just have to look at the coefficients that are given in the balanced chemical equation. In our case, the coefficient in front of lithium is 6 and the coefficient in front of nitrogen gas is 1. Therefore, the molar ratio is six-to-one.