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Gold is sold by the troy ounce (31.103 g). What is the volume of 1 troy ounce of pure gold?

The unit "troy ounce" is often used for precious metals such as gold (Au) and platinum (Pt) (1 troy ounce =31.103 g). (a) A gold coin weighs 2.41 troy ounces. Calculate its mass in grams. (b) Is a troy ounce heavier or lighter than an ounce (1 lb=16 oz; 1 lb=453.6 g) ? | Numerade

Mining 101: Ultimate List of Gold Mining Equipment - preciousmetalinfo.com