The problems I chose this week was 3.77 and 4.77: 3.77. Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass? Step 1: I need to find the mass of Cul in the salt. Step 2: I will find the mass of CuI. Cu = 63.55 g/mol I = 126.90 g/mol Molar mass of CuI = 63.55 + 126.90 = 190.45 g/mol Step 3: I will calculate the moles of CuI. Answer: Reason: The amount of copper(I) iodide (CuI) in 1.00 pounds of salt is minimal, as only 0.0100% of the salt is CuI. That means out of 454 grams of salt, only about 0.0454 grams is CuI. Since CuI is a heavy compound, even this small amount equals just 2.38 10 moles. This demonstrates that even small amounts of a compound can be measured and added to food for health benefits, such as providing iodine in table salt. 4.77. Would you agree to buy 1 trillion (1,000,000,000,000) gold atoms for $5? Explain why or why not. Find the current price of gold at http://money.cnn.com/data/commodities/ (1 troy ounce = 31.1 g). First, I will need to find out how much gold is 1 trillion atoms. This equals 0.000000000327g of gold. Next, I will find the value based on the current gold price from sources like forture.com. According to this source, the spot price for gold is approximately $3,383.89 per troy ounce, equivalent to $108.79 per gram. Using $108.79/g, the value of that mass is $108.79/g 3.2710g