(4) HBr and H2SO4 is the correct answer.
Hope this would help~
Answer:
A. Carboxyl group
Explanation:
The carboxyl group is an organic functional group in chemistry that consists of a carbon atom double-bonded to an oxygen atom and singly linked to a hydroxyl group. Another way to think about it is as a carbonyl group (C=O) with an attached hydroxyl group (O-H).
There’s lots of measurements. (m, kg, s, mol, cm, in, mm) etc
I think the molecular formula would be CHO.
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I think the answer is A. Hope that helped :)
