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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