Two Identical Iron Spheres Have Equal Positive Charges and the Force

question 7

Multiple Choice

Two identical iron spheres have equal positive charges and the force between them when they are 1.4 m apart is 1.4 N.What percentage of the electrons has been removed from each sphere if each sphere has 1 mole (6 × 10²³) of iron atoms? (k_e = 8.99 × 10⁹ N⋅m²/C²,the atomic number of iron is 26,and the electron charge is −1.6 × 10−¹⁹ C)
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• A) 0.001%
• B) 0.000 002%
• C) 1 × 10−⁸ %
• D) 7 × 10−¹⁰ %
• E) ​7 × 10−¹² %

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