Chem Lab C

_deltaV
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Re: Chem Lab C

Postby _deltaV » Wed Feb 15, 2017 7:51 pm

Just adding to what Avogadro said, in the rules it states that you have to know general chemistry concepts, stoichiometry being one of them. It's completely fair for a proctor to make a test consisting entirely of gas and thermo stoich calculations. In fact, our regional supervisors do just that every year, no conceptual questions
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gryphaea1635
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Re: Chem Lab C

Postby gryphaea1635 » Thu Mar 09, 2017 1:12 am

Have any of you taken the Captain's Tryouts Chem Lab test (from Syosset High)? A bunch of people who tried out flat out received zeros on it. I don't do Chem Lab myself, so is the test really that difficult? I'm trying to decide on a roster for our team but it's harder making a decision when everyone receives zeros on an event... :mrgreen:
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Re: Chem Lab C

Postby Unome » Thu Mar 09, 2017 1:16 am

gryphaea1635 wrote:Have any of you taken the Captain's Tryouts Chem Lab test (from Syosset High)? A bunch of people who tried out flat out received zeros on it. I don't do Chem Lab myself, so is the test really that difficult? I'm trying to decide on a roster for our team but it's harder making a decision when everyone receives zeros on an event... :mrgreen:

It's certainly a very difficult test (especially the derivations in the latter half) but if people got zeroes they clearly must not have taken a chemistry class yet. I could probably score at least 40 points just off of what I learned in chem (though admittedly I took AP and got a 5).
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Re: Chem Lab C

Postby Avogadro » Thu Mar 09, 2017 2:01 am

gryphaea1635 wrote:Have any of you taken the Captain's Tryouts Chem Lab test (from Syosset High)? A bunch of people who tried out flat out received zeros on it. I don't do Chem Lab myself, so is the test really that difficult? I'm trying to decide on a roster for our team but it's harder making a decision when everyone receives zeros on an event... :mrgreen:

Yeah, zeros are a bit unusual. I haven't seen anything like the derivations in the later part of that test since taking that one, but a fair bit of the rest does get covered. In the tests I've taken, however, that stuff is typically intermingled with some simpler stuff (i.e. simple Boyle's/Ideal Gas Law problems, q=mc∆T, etc.)
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Re: Chem Lab C

Postby kaziscioly » Sat Apr 22, 2017 10:40 pm

What is the distinction between average molecular velocity and root mean square velocity, and how do you calculate them differently? The only formula I have been introduced to is Sqrt[3RT / M], and I don't quite understand how average velocity should be calculated differently.


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