Hello @jerryg-special, instead of taking pictures of all the formula, you can always type it here.
For instance, the last thing you took a picture of can also be written as shown below
Cu2+(aq) + 2e- → Cu(s)
n, number of moles of electrons = 2
mass of copper depoited= 2.70g
Q=?
F= 96500c/mol
molar mass of copper= 63.5g/mol
Thus, 2.70g= 63.6/2 x 96500 x Q
Cross multiply
2.70 x 2 x 96500= 63.5 x Q
Q= (2.70 x 2 x 96500)/ 63.5
Q= 8206.3C
Pb2+(aq) + 2e- → Pb(s)
n, number of electrons = 2
Q= 8206.3C
Molar mass of lead = 207g/mol
F= 96500C/mol
You need to work on your use of markdown.
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Thanks.... I prefer to take those pictures while using the formula rather than using markdown. Once again thanks for your observation