[s3a]

Let's say there is a chemical equation:

x + 2y ---> Cz

where the numbers (none means 1) are the coefficients and the small letters are the chemicals.

Let's just imagine a random amount of chemical x. Let's say that that random value is 0.5 mol and that there is 1 mol of chemical y. If the ratio was 1:1, I would know that the limiting reagent would be the chemical that there is less of which would be chemical x (again, if the ratio was 1:1). But lets say this is not the case.

Like my logic is: if you have twice as much of chemical y but you also need twice as much of it, then how do you know which is the limiting reagent?

Any help would be GREATLY appreciated!
Thanks in advance!

[Borek]

If they react 1:2 and you have twice as much of the second, neither is limiting - you just have stoichiometric amounts and they will be both used to the end.