I have to complete a task, but I can't find an answer. Can anyone help me?
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Loading...Some (maybe a few million?) would hide in bunkers before the evil began. But what would happen after that? Would that be the complete end of humanity? Or would a scenario like in the Fallout games play out? Not with the same monsters, of course, but with humanity slowly finding its way back to the…
Hello, heavy metals have apparently been found in tampons. Is this statement from a TikTok comment on a video about this true? Comment: "Well, if the metals have been boiled in acid, the acid acts as a catalyst, so they could be salts in which a proton dissolves the non-metal and thus the metal. Thus,…
How can you make barium carbonate? Or where can you buy it locally?
Can someone help me and explain it? For task 4, I would guess all metals that are less noble than iron.
Ethanol is found in a number of products of the a) briefly describe one method each for producing ethanol for use as a food and as a cleaning agent? b) What properties determine the use of alcohols in the cosmetics industry? Which alcohols are used? c) after consumption of alcohol, it is broken down in…
Individual properties such as aggregate state, conductivity etc do not help out in a characterization.
You can compare the whole thing with a screen that only has a pore size. If you pack a mixture there, only a part is filtered out (i.e. a property). You need different pore sizes to end up just getting what you really are looking for. So several screens or properties help you find out exactly what you are looking for.
If you are looking for a person, an indication like “It is a woman” does not really help:)
If you know that only two substances are in question, then almost always a single property is enough to distinguish – you just have to choose the right one.
Example sugar or sodium chloride? Color would be unsuitable, but if desired crystal form, melting point, density, solubilee in water would be all properties, each of which gives a clear answer.
Maybe the question was quite different – I can’t imagine how.
Because a single property can also be the same for several different substances.
For example, if you only look at the “electrically conductive” property, you don’t know if you have copper, aluminum or graphite. Runs everything super….
Takest mercury and uran or gold
Can you distinguish sugar from salt by colour?