As you well know, this reduces to one to one. However, the ChemTeam will use the unreduced fraction in the lessons to follow. The exact molar ratio you would use depends on how the problem is worded. They do not in any way tell you HOW MUCH is reacting. This point is elaborated upon in what the ChemTeam believes is the next logical unit from here.
Problems Following each equation are two requests for molar ratios from the equation.
2 NH 3 Write the molar ratios for N 2 to H 2 and NH 3 to H 2 .