Answer:
In the presence of a base, blue litmus paper will turn red........
I believe it can be warm because usually the surface below us is warm itself, causing the air to be warm as well. The temperature can vary as well
Answer:
the third one
Explanation:
if you look at it mathematically its the one that makes the most sense
Answer:
Group 8A
Explanation:
This is because the elements in Group 8A is stable, what I mean is this elements have the maximum number of electrons in there last orbit so they dont need to form any compund with any other element in the periodic table.
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Hydrogenation – meaning, to treat with hydrogen – is a chemical reaction between molecular hydrogen and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to reduce or saturate organic compounds.