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26-09-2017
Chemistry

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How many gold atoms are in an 0.333 ounce, 18 k gold bracelet? (18 k gold is 75% gold by mass.)?

Respuesta :

09-10-2017

0.333 ounce * 0.75 * 28.35 grams/ounce = 7.080 grams gold 7.080 grams Au / 196.967g/mol Au = 0.0359 mol Au 0.0359 mol Au * (6.023 * 10^23) atoms/mol = 2.24 * 10^22 Atoms Au

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