Physical change!
a solid that turns into a liquid is called melting and melting is a physical change.
something like that. sorry if it’s wrong
<span>1 Cu + 2 H</span>₂<span>SO</span>₄<span> = 1 CuSO</span>₄<span> + 2 H</span>₂<span>O + 1 SO</span>₂
Coefficient od CuSO₄ = 1
hope this helps!
None. AlCl3 is aqueous, and AgBr forms a precipitate, although AgBr3 does not exist
The answer is never because there's no electricity
