Answer:
Option O = H₂O
Explanation:
Chemical reaction:
2K + 2H₂O → 2KOH + H₂
In this balanced chemical equation we can see that water is the only compound that consist of two hydrogen atom and one oxygen atom. H : O
2 : 1 .
In case of KOH two hydroxyl and two potassium atom are present and ration is K:OH 1:1.
Answer:
I believe it is B.
Explanation:
because an element is a for sure pure substance and I am sure a compound is too. I appologize if I am wrong.
Explanation:
Sand and iron fillings have the same size of particles.
It would be difficult to use a mesh to separate them. Also, sometimes , the iron filing clings well to the surface of the sand particles.
The best way to separate them is to use a bar magnet. The magnetic properties of the iron fillings will get it attracted to the bar magnet leaving the sand particles behind.
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Extraction brainly.com/question/5881840
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Answer:
D. chemical alters the atomic structure of a substance, while physical does not
hope this helps!
I believe its a...................
