OK SO THE PROBLEM Here, the real problem is this one.. which is almost lik the yellow thing , because we are talking about combining things.


i know that Cl2 can react with H2 to form 2 HCL righ?

so if i have 10 parts of Cl2, and 15 parts of H2.

10 parts of Cl2 will combine with 10 parts of H2, leaving intact, 5 parts (excess) of H2.

So how do i calculate that reacting percentage?

if i have 10 to 10 its 100% used
if i have 5 to 10 its only 50%
etc etc, there is a expression that can be made here right?
that is what im looking for, i just talk about the colors to simplify but i think it was worse.