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Defining the Mole Name Date Block Any atomic mass on the periodic table represents the mass of one mole of atoms One mole of iron weighs 55 845 grams One mole of zinc weighs 65 39 grams In both samples there are the same number of atoms 6 02 x 1023 but zinc atoms are bigger and heavier remember those protons neutrons than gold atoms so a mole of zinc weighs more Part I Instructions Use a periodic table to fill in the blanks For atoms 1 One mole of magnesium weighs grams 2 One mole of strontium weighs grams 3 One mole of silver weighs grams 4 One mole of argon weighs grams For molecules 5 One mole of potassium chloride weighs grams 6 One mole of calcium bromide weighs grams 7 One mole of sodium hydroxide weighs grams 8 What is the mass of one mole of carbon grams 9 What is the mass of one mole of cobalt grams 10 What is the mass of one mole of sodium grams 11 What is the mass of one mole of titanium oxide grams 12 What is the mass of one mole of lithium oxide grams 13 What is the mass of 6 02x1023 atoms of zirconium grams 14 What is the mass of 6 02x1023 atoms of radon grams 15 What is the mass of 6 02x1023 molecules of aluminum chloride grams 16 What is the mass of 6 02x1023 atoms of tin fluoride grams Part II Unit Conversion Problems Atoms Molecules Show all work for the following atom molecule mole conversion problems by using Avogadro s number Remember 1 mole atoms or molecules Be sure to enter parentheses around any number in scientific notation when you enter it into your calculator 1 Convert 3 52 x 10 26 atoms of gold to moles of gold For atoms For molecules For atoms For molecules 2 Convert 9 2 x 10 22 atoms of silver to moles of silver 3 Convert 5 2 x 1021 molecules of titanium hydroxide to moles of titanium hydroxide 4 Convert 1 56 moles of gold oxide to molecules of gold oxide Hint flip your conversion factor to get moles to cancel Part III Gram to mole mole to gram conversions Use the notes that you took during class discussion and the sample problems you did for HW as a model to solve the following problem Show all work for the following mass mole conversion problems 1 Convert 0 24 moles of magnesium to grams of magnesium 2 Convert 1 7 moles of nickel to grams of nickel 3 Convert 0 049 moles of sodium chloride to grams of sodium chloride 4 Convert 4 5 grams of iron III oxide to moles of iron III oxide 5 Convert 2 00 grams of water into moles of water 6 Convert 75 57 grams of potassium bromide into moles of potassium bromide Part IV Mixed Review Homework Instructions complete the following unit conversion problems and show all work These will be graded for correctness 1 Find the number of moles in 15 grams of silver 2 A pure gold ring weighs 23 5 grams How many atoms of gold are in the ring 3 How many moles of iron II oxide are in a nail that weighs 12 4 grams 4 A gold bullion bar used in banking and international trade has a mass of 400 ounces One ounce equals 31 10 grams How many atoms of gold are in a gold bar 5 A carat has a mass of 25 grams A diamond is made of pure carbon How many carbon atoms are there in a 2 9 carat diamond 6 The FDA recommends that we eat 1 3 grams of calcium per day How many moles of calcium should we be eating per day 7 The FDA recommends that adults consume 9 x 10 4 grams of copper per day to help with enzymes that work in your liver a Calculate the number of atoms of copper you consume each day b Calculate the moles of copper you consume each day 8 In a laundry tablet there are 0 750 grams of sodium carbonate Calculate the number of molecules that are in the laundry tablet

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