An electrically neutral coin of mass m=3.0g contains equal amounts of positive and negative charge. Assuming the coin is made up of pure copper, what is the magnitude of the total positive change on the coin? Molar mass of copper =63.5g mol/per and atomic number of copper is 29.
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Explanation:
1 mole of copper substance = 6.023 x 10²³ cu atoms
63.5gof cu substance = 6.023 x 10²³ cu atoms
1g = 6.023 x 10²³/63.5
3g = (6.023 x 10²³ x 3 )/63.5 atoms
in one cu atom contains 29 no. of protons
total positive charge = N e
where N = (6.023 x 10²³ x 3 x 29)/63.5
Q= N X 1.6 X 10 ^- 19 C
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