a)
A: Copper
B: CuO
C: 
D: $\mathrm{CuCO_3}$
E: $\mathrm{CO_2}$
F: $\mathrm{Cu(NO_3)_2}$
b)
$\mathrm{CuO+ H_2SO_4}\rightarrow \mathrm{CuSO_4 + H_2O}$
c)
$\mathrm{CuCO_3+ 2HNO_3}\rightarrow \mathrm{Cu(NO_3)_2+ CO_2+ H_2O}$
C or a one of those hope it helps !!!!
Answer:
More energy is required to raise its temperature. Therefore, temperature does not stay the same when heat energy increases.
the cell will expand as water moves into it.
Answer:
concave lens
Explanation:
it's concave lens because it diverges the ray/beam of light.