Starter: Study Guide: Vocabulary words 1-6 September 20, 2011 The Mole Song (2nd try) • http://www.youtube.com/watch?v=1R7NiIum 2TI Chalk Talk • What is the mass in grams of 2.25 mol of the element iron, Fe? 2.25 mol Fe x (55.9g Fe/1 mol Fe)=126g Fe Chalk Talk • What is the mass in grams of .375 mole of the element potassium, K? .375 mol K x (39.1g K/1 mol)= 14.7 g K Chalk Talk • What is the mass in grams of .0135 moles of the element sodium, Na? .0135 mol Na x (23 g Na/1 mol)=.310 g Na Chalk Talk • What is the mass in grams of 16.3 mole of the element nickel, Ni? 16.3 mol Ni x (58.7g Ni/1 mol Ni)=957g Ni Chalk Talk • A chemist produced 11.9 grams aluminum, Al. How many moles of aluminum were produced? 11.9g Al x (1 mol Al/ 27 g Al)=.441 mol Al Chalk Talk • How many moles of gold, Au, are in 3.60 x 10-10 grams gold? 3.6 x 10-10 grams Au x (1 mol/197 g Au)=1.83 x 10-12 mol Au Chalk Talk • What is the mass in grams of 7.5 x 1015 atoms of Nickel, Ni? 7.5 X 1015 atoms x (1 mol Ni/ 6.02x 1023atoms) x (58.7g Ni/1 mol)=7.3x10-7 g Ni Chalk Talk • How many atoms of sulfur, S, are in 4.00g of sulfur? 4.00g S x (1 mol S/ 32.1g S) x (6.02 x 1023 atoms S/1 mol S) = 7.50 x 1022 atoms S Chalk Talk • What mass of gold, Au, contains the same number of atoms as 9.0g of aluminum, Al? 9.0g Al x (1 mol Al/27.0g Al) x (6.02 x 1023 atoms/1 mol Al)= 2.01 x 1023 atoms Al 2.01 x 1023 atoms Au x (1 mol Au/6.02 x 1023 atoms) x (197 g Au/1 mol Au)= 65.7 grams Au Homework • Due: TOMORROW • Pg. 85 # 5-7; pg. 87 # 17, 18, 22, 23 • • • • DUE: FRIDAY Atomic Structure Worksheet (take home quiz) ONLY SECTIONS 1-2 You may work with a partner on this quiz….BUT DO NOT CHEAT!