The most common source of copper (Cu) is the mineral chalcopynto (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 500 g of pure Cu? Express your answer to three significant figures and include the appropriate units. View Available Hints) Value Units Submit Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 5.00 moles of aluminum sulfate, Al2(SO4)3 Express the number of moles of Al, S, and O atoms numerically, separated by commas. View Available Hint(s) VE ? moles of Al, S, O = moles Submit How many copper atoms are in a pure copper statue with a mass of 118 kg ? Express your answer to three significant figures. O Bu ? N = Cu atoms Submit Request Answer In the gaseous state, chlorine exists as a diatomic molecule C1, (Molar mass - 70.9 g/mol). Calculate the number of molen of chlorine present in 140 g of chlorine gas Express the quantity in moles to three significant figures. View Available Hints) 2 Moles of chlorine gas - 2.11 mol Submit Previous X Incorrect; Try Again: 5 attempts remaining