How are you guys gonna practice the lab section?
'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?
Now you're prepared for when an event supervisor inadvertently asks questions about molarity'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
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.Now you're prepared for when an event supervisor inadvertently asks questions about molarity'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
On the wiki if you go to the old test exchange, on the 2018 full test set for Garnet Valley Invitational, there should be a test for Density that was run as a trial last year (since its a trial test, it is fairly basic, so it would be a good place to start off with, but don't expect tests this year to be like that).Do any of you know if there are any practice tests for Density Lab?
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