In the Haber process, the reaction between the two gaseous reactants needs a catalyst that includes a transition element. Which metal is used, and in what mole ratio do the gases react?
- Ametal: Fe, mole ratio: $1:2$
- Bmetal: Fe, mole ratio: $1:3$
- Cmetal: V, mole ratio: $1:2$
- Dmetal: V, mole ratio: $1:3$