Unome wrote:Killboe wrote:'John Richardsim wrote:I don't exactly understand why they removed calculations of molarity from 3.d.ii. At first I thought that it was to avoid moles, but they left the ideal gas law in 3.d.iii, so I don't really know.
Another thing about the rules I don't understand is why they limit the use of parts-per notation to million and billion. For example, if I wanted to make a question about something at a concentration of 5 parts-per-trillion, couldn't I just say a concentration of 0.005 parts-per-billion in order to get around this?
I like how I spent like an hour studying how to calculate molarity and stuff like that and then I just see this comment. kmn
Now you're prepared for when an event supervisor inadvertently asks questions about molarity
It's an extremely useful thing to know anyway if you're ever going to do any chem events or take any chem classes in the future.