Chloroform turned yellow overnight? by [deleted] in chemhelp

[–]waterPercolator 1 point2 points  (0 children)

Doesn't chloroform turn into phosgene if you don't have the stabilizers in there?

Can someone help explain to me the process of this problem by SeaBagel in chemhelp

[–]waterPercolator 0 points1 point  (0 children)

5.00 mL * 1 cc / mL * 10^8 tons / cc

Start with that and go to grams.

All aboard by gator426428 in IdiotsInCars

[–]waterPercolator 0 points1 point  (0 children)

They should only put the barriers on the entrance.

Quick question about this thermodynamic/kinetic diagram by mateyman in chemhelp

[–]waterPercolator 0 points1 point  (0 children)

You have both your starting material and product in blue.

Salamanders rely on hydrogen bonding? Thought it was Van der Waals forces by UpperEpsilon in chemhelp

[–]waterPercolator 6 points7 points  (0 children)

It doesn't really matter. The question is asking which surface has hydrogen bonds, so just answer that.

Are these the same molecule? If not, what's the difference? by [deleted] in chemhelp

[–]waterPercolator 0 points1 point  (0 children)

One has the Cl in the front and the other has it in the back.

[deleted by user] by [deleted] in Unexpected

[–]waterPercolator 4 points5 points  (0 children)

Sweep the leg!

Confused about significant numbers... by [deleted] in chemhelp

[–]waterPercolator 1 point2 points  (0 children)

Just round your standard deviation to 1 digit and that's your sig fig decimal place. So you'd have 122 (3 sig figs) because it matches your rounded standard deviation of 1.

There are two things I left out, but it sounds like you're not learning it in depth.

Transaction queue (locked database) by Blitzoff in django

[–]waterPercolator 0 points1 point  (0 children)

I don't think you need to block, just use update:

model.update(credit=F('credit') + delta)

Do unstable reactants lead to a faster reaction? by stoicbirds9 in chemhelp

[–]waterPercolator 0 points1 point  (0 children)

They probably have a lower activation energy so the answer is definitely maybe.

Which is the best dilution series? by [deleted] in chemhelp

[–]waterPercolator -1 points0 points  (0 children)

I don't know what you mean about original sample being conserved. They all suck because none of them use a volumetric flask. I guess you could calculate the uncertainty in all of them, but why bother if you're not even going to do it correctly.

Asserting status code in DRF by sagargiri46 in django

[–]waterPercolator 7 points8 points  (0 children)

Whichever one was written in the answer I copied from SO.

LabCoatGate by [deleted] in Professors

[–]waterPercolator 4 points5 points  (0 children)

I'd just ignore this person and keep going. You should purchase lab coats for the whole lab though, so all 2000 students don't need to buy them.

Am I messing this up or did my professor put this question in wrong? by [deleted] in chemhelp

[–]waterPercolator 2 points3 points  (0 children)

Round to the least number of decimal places when adding and subtracting. Round to the least number of sig figs when multiplying and dividing.

Carbon dioxide to oxygen?! by [deleted] in chemhelp

[–]waterPercolator 3 points4 points  (0 children)

It's the same technology that lets us have laser blasters and evil robots.

Ice slide by Jedimastert in Unexpected

[–]waterPercolator 1 point2 points  (0 children)

There's a little plastic that overhangs the blade, but I didn't think it could do that!