Answer: 27 is A and 28 is C.
Explanation: I’ll explain 28 but not 27 because that’s just definitions.
In CuSO4 there is a Cu, an S, and 4 O molecules. Add them up you get 6.
Answer:
well what do you think it is
Explanation:
huh?..
The answer is A. Hope this helped
D. An alkali metal
yeah hope this helps