Nobody can solve this class 8 question.If you have the courage then solve this.
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Answer:
13.6 x10∧-6
Explanation:
No of coulombs = q = it = 6.023 x 2 coulombs = 12.046 coulombs
1 mole of Cu = 63.55 g
20 g of Cu = 20/63.55 = 0.315 moles , Cu atomic number = 29
all electrons = T = 20x29x6.02x10∧23e/63.55 = 5.5x10∧24e
but for free electrons the number of electrons is
N = 12.046 ÷ 1.602×10∧-19 = 7.5x10∧19e
,
Ratio = N/T = 7.5x10∧19e ÷ 5.5x10∧24e = 13.6 x10∧-6
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