/sci/ - Science & Math

>>8802765
Sugars found in humans are chemicals produced by life on Earth, not something that is found in lifeless nature. There are some sugars in lifeless nature but they are not abundant and not the same molecules anyway. No reason why it would be likely to encounter sugar-earting alien organisms.

I also see no reason why salt should make us more edible. Or water.

If you have infinite planets, then yeah, there will be an alien organism that can eat us, but any random planet we encounter should be pretty safe statistically. Not sure how many life forms we'd need to meet before we should even start thinking about the probability of meeting something dangerous but it's probably a huge number.

Most bacteria on Earth require vitamins and other molecules created by life to grow and to do anything. Humans would not have alien vitamins and therefore we'd be pretty hard to digest. There are some bacteria (like E. coli) here on Earth that can make pretty much all the chemicals it needs on its own (except for water maybe) if it is given the required elements (there are dozens of them). While elements should be pretty similar between rocky planets, life forms probably differ enourmously in how much (if any) of any particular element they carry around with them. And most elements usually form compounds that might or might not be usable by a random life form.

Then there's stuff like pH, temperature and pressure and whatnot that would make it harder still. It would be like mixing up some motor oil, dishwasher cleaner, car wax and spent nuclear fuel in a bowl and then pondering if there's a life form that could live on it. There could be. But it's not likely we'll find one.

Hello 4Chan. Newfag here. Do you think if I have some solid basic knowledge of chemistry I can learn how to write an exam on this level and get a very high result? It's in Polish but it doesn't matter much I guess.

Link:
http://cke.edu.pl/images/_EGZAMIN_MATURALNY_OD_2015/Arkusze_egzaminacyjne/2014/chemia_PR_A1.pdf

I'm thinking about studying chemistry after high school,how hard is it?

Okay a few questions.
If you are heating a chemical do you indicate it in the equation and how?
If universal indicator is used do you indicate it in the equation and how?
And how is Potassium dichromate solution + sodium hydroxide + HCL written.