What is the voltage for the following cell: Cu(s)| Cu+(aq) || Mg2+(aq) |Mg(s)? 1. 2.98V
2. 2.89V
3. 3.78 V
4. 3.87 V ​

Need on both questionswill markbr />

What is the mass of sodium in 3 moles of sodium chloride

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.