Recent content by Mayhem

Very good example and I vaguely recollect a video demonstrating this. Something along the lines of e coli (or another bacteria) on a surface of antibiotics, and the evolved species would traverse the entire surface.

Our interpretations of stories are interesting, because we will ascribe meaning to narratives as being metaphors, allegories or allusions, yet our lived experiences are always interpreted literally. No one ever thinks "My back pain is a metaphor the burdens I bear ". They just think "I should...

I impressed your mother carried you to your As someone from the upper middle class (arguably only recently), the careers that lead here are lined with soul-draining bureaucracy and meaningless endeavors that do not satisfy anyone or anything except a quota put forth by higher powers. I can see...

"Really, nobody took a step back and asked..." And then proceeds to present extremely non-trivial physical chemistry. I find that many such parameters go undiscovered because many synthetic groups simply lack the know-how for such studies. Good others take initiative.

Purity of x% usually just means "we made sure it is x% pure, we literally have no conclusive data on the remaining percents". Also 0.1% anything should be inconsequential.

I mean salt for technical use, like for water softening (dish washers) or deicing, should be cheaper than food grade table salt.

Can't you use general purpose salt (non food grade) containing fewer additives. What does the salt used for dish washers contain aside from NaCl?

Why are you resorting to chemical means rather than simply poking holes? 0.3 mm is just aluminium foil?

Yes, because intelligent life wouldn't visit a planet where my in-laws reside.

Don't use SDS and similar date for solubility. They can be wildly inaccurate. A reaxys search shows that the solubility of the heptahydrate to be 29.77 wt% at 35 C. (E. L. Simons, 1951: https://doi.org/10.1021/ja01153a087) I indexed a Russian journal stating 27.47 wt% at 25 C, but I cannot...

"Why haven't aliens visited us?" For the same reason dolphins don't build rocket ships. Intelligent life is not necessarily curious life.

Please provide your reference. One must be very careful when interpreting enthalpy values.

Strictly speaking, Ca does not have a filled outer shell in the sense you are referring to. It has 2 e in the 4s orbital. Elemental Ca is also very reactive since losing these two electrons yields a full octet shell (3s 2 3p6). In the same row. If you go a few elements back, the noble gas Argon...

Saturate at 40 C, cool to r.t. under lid. Add water until dissolved or simply just filter and add 5% more water.

Since your solvent and your cocrystallized solvent are the same, you can just choose what you want to do. When specifying w/w%, writing the exact formulation of your solute is mandatory. If you specify a solution of MgSO4 * 7 H2O and actually use this salt to create your solution, then do not...