Problem: Precious metals are sometimes weighed in old-timey units like “troy ounces”, where 1 troy ounce = 31.1035 grams.  A platinum coin is made that weighs 0.5003 troy ounces.  The coin has a radius of 13.5 mm and a thickness of 1.28 mm.  (Useful information: volume of a cylinder = (π r2)h  where r is radius, and h is height or thickness)a) What is its density, in g/cm3?      b) How many atoms of platinum are in the coin?

🤓 Based on our data, we think this question is relevant for Professor Barondeau's class at TAMU.

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Precious metals are sometimes weighed in old-timey units like “troy ounces”, where 1 troy ounce = 31.1035 grams.  A platinum coin is made that weighs 0.5003 troy ounces.  The coin has a radius of 13.5 mm and a thickness of 1.28 mm.  (Useful information: volume of a cylinder = (π r2)h  where r is radius, and h is height or thickness)

a) What is its density, in g/cm3?  


b) How many atoms of platinum are in the coin?

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Based on our data, we think this problem is relevant for Professor Barondeau's class at TAMU.