I asked few months ago a similar question, but I wouldn't ask this again if I understood it completely then. I've done these problems by memorizing rather than understanding them.
dissociates on PCl3
. Under 200°C and p=101.325Pa, the density of the gas mixture towards hydrogen is 70.2. How many percents of PCl5
dissociated on this temperature?
-I was solving it this way:
x-y y y
How do I get those equations? Why has x+y to be 1?