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Denominator vs numerator - getting confused on which is which
You want the price for one cookie, so the answer that you want is in dollars per cookie. That means ... |
3-10-2019 at 17:42
by: Geocachmaster |
Cutting grooves on Al2O3 tube, carbide or diamond?
I agree with markx, just wrap the wire and use some mortar to hold it in place. I made a tube furnac ... |
24-2-2019 at 07:46
by: Geocachmaster |
Whatever happened to Doug's Lab..?
Doug hasn't logged onto Sciencemadness since he disappeared. He hasn't been active on any social med ... |
16-1-2019 at 13:04
by: Geocachmaster |
Making A Test Tube Rack -- Evenly Spacing Holes
Make the first mark radius+0.5 inches in from the edge, then continue making marks every diameter+0. ... |
21-6-2018 at 16:38
by: Geocachmaster |
How Hot can boiling salt water get?
About 107 C, at atmospheric pressure at least.
~400g of sodium chloride will dissolve in 1 Kg of ... |
6-6-2018 at 15:14
by: Geocachmaster |
Prepublication section, why not make a amateur-scientific journal ?
This is a great idea!
Because of likely sporadic participation, how about a limit of ~20 papers p ... |
4-6-2018 at 17:37
by: Geocachmaster |
Gibbs Free Energy help
No, Le Chatelier’s principle states that a system at equilibrium will readjust to counteract a cha ... |
22-5-2018 at 04:04
by: Geocachmaster |
Gibbs Free Energy help
Looking up the values in some books I have, I get a ∆S of -167 J (close enough) for the reaction w ... |
21-5-2018 at 13:37
by: Geocachmaster |
Gibbs Free Energy help
The biggest problem is the units of S˚f. Entropy is given as J/mol*K, while enthalpy and Gibbs free ... |
20-5-2018 at 13:16
by: Geocachmaster |
Small scale preparation of Stannic Chloride (SnCl4)
Yes, you should dry the Cl[sub]2[/sub]. If you don't have a drying tube or Drechsel Bottle, just use ... |
26-4-2018 at 03:16
by: Geocachmaster |
When Chemistry Goes Wrong
Tonight I was distilling HCN (produced from ferrocyanide and acid) into alcoholic NaOH to produce so ... |
20-4-2018 at 18:21
by: Geocachmaster |
Doug's Lab
Very weird though. On 2/12 he posted on Twitter that a video was coming out that night. That was the ... |
4-4-2018 at 18:36
by: Geocachmaster |
Homebuilt 1300°C tube furnace
I just built a tube furnace which is capable of reaching 1100 C.
The heart of the furnace is an [ ... |
31-3-2018 at 05:06
by: Geocachmaster |
new toys
I just got two reaction vessels with lids! Both are 2 liters, one is glass and the other is stainles ... |
23-3-2018 at 07:49
by: Geocachmaster |
Looking to interview (professional) organic chemist
I am currently in my second year of high school and I’m figuring out what to do with my life. I kn ... |
12-3-2018 at 03:50
by: Geocachmaster |
Latest chemical order?
This just arrived today. I’m super excited because I’ve been looking for chloroacetic acid for a ... |
23-2-2018 at 13:47
by: Geocachmaster |
Latest chemical order?
250g sodium metal 
It was actully a Christmas present from my mom 
Here it is, cleaned and ... |
30-12-2017 at 07:04
by: Geocachmaster |
Thiourea disposal
Does anyone have experience disposing of thiourea? I can't seem to find anything on it anywhere.
... |
24-12-2017 at 09:39
by: Geocachmaster |
Bad days in the lab or with glassware?
Trying to make magnesium nitride today, apparently red hot magnesium isn't compatible with fused qua ... |
23-12-2017 at 19:24
by: Geocachmaster |
Hard balancing
Edit: Spoiler warning if you are trying to solve it
Do you mean 2:3:2 2:3:3 ?
The answer y ... |
18-11-2017 at 05:10
by: Geocachmaster |
When Chemistry Goes Wrong
Hydrolysis isn't very fast at room temperature. Otherwise you wouldn't have to reflux the mixture to ... |
17-11-2017 at 16:19
by: Geocachmaster |
When Chemistry Goes Wrong
Every time I've made an ester I've had low yields, usually in the 50-60% range. Recently I was makin ... |
17-11-2017 at 15:38
by: Geocachmaster |
Sources of choline chloride in Australia
Yep, that's me. I added some narration to make the video a bit more bearable. Maybe it's up to aga's ... |
21-10-2017 at 04:41
by: Geocachmaster |
Stopcock size
Are the sizes of glass stockcocks standardized? I need one that has a 2mm bore, ~30mm long, ~13mm wi ... |
14-10-2017 at 19:11
by: Geocachmaster |
:(
I would not recommend drying chlorine chloride at a temp greater than 150 C. Today I had about 50g d ... |
14-10-2017 at 18:47
by: Geocachmaster |
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