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The cost of discharging 6.0g of a divalent metal, X from ...

The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?
[X = 63, Y = 27, 1F = 96,500C]

A.

N12.00

B.

N27.00

C.

N63.00

D.

N95.00

Correct answer is C

For X:  X2+ + 2e X

2F = 63g

xF = 6g

x = 6×263=421F

421F = N12.00

1F = 12421

= N63.00

1F is equivalent to N63.00.

For Y: Y3+ + 3e Y

3F = 27g 

xF = 9g

x = 3×927

= 1F

1F = N63.00