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(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) Imagine adding electrons to the pin until the negative charge has the very large value 3.00 mC. How many electrons are added for every 109 electrons already present?
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Answer #1

a n 6.02 x l03 x 47 7.87 2.62x1024 Awp -2 ne x -87s x lo6 2.62 x 101 . 7.6

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