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ould someone mind double checking my review on atoms and moles… I just want to make sure I am understanding! Thank you!

ould someone mind double checking my review on atoms and moles… I just want to make sure I am understanding! Thank you!

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter2: Atoms Molecules And Ions
Section: Chapter Questions
Problem 165SCQ
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Would someone mind double checking my review on atoms and moles… I just want to make sure I am understanding! Thank you!
3A Periodic Table of 15 Ne 28 14 13 CN Orygen 16.00 Fluorine 19.00 Nen 20.18 Mitrogen tahan moles of Au = mass Au 3x 31.10 = 93 95.3g pter 5 molar mass Au Section 5.1 23 93.3 196.97 6.022 X 10 items .474mol Calculate the following: 4) Gold is often sold in units of troy ounces. There are 31.10 g per troy ounce. I mol items a) How many atoms of gold are in 3.00 troy ounces? molar mass Au = 196/97 31.109 per troy oz .474mot Au . 6.022 x 10 atoms 23 23 =2.85 X 10 a toms Inol Au b) If the current value of gold is $1230 per troy ounce what would it cost to buy 1.516 moles of gold? 1.516 mates Auo 196.97 I troy ounce 31.10g 9.601 Au troyoz %3D Section 5.2 $1230.9.601 =1809.84 串1181×10' Know: 59 Need: #of atoms C: 6(12.01)' 72.06 A: 12 (1.01) 0: 6 (16.00) 96 5) The number of Çarbon atoms in 5.00 g C6H12O6 5.00g 150.18g/mol Mass Molar mass =.0278 mol x 6= • 1665001b68 Cmol 12.12 •I665001668 Coot x 6,022X lotatoms 23. I mot 23 1.00X 10 180.18 189/mol Section 5.3 belo Catoms 6) Determine the mass percent of oxygen in Ba(CIO3)2 percent by mass of elemen't n X molar muss Ba: 137.33 (1:2(35.45) 0:6(16.00) 96. n X 100 molar mass of Com pound 304.23 6.16 96 X 160 = 32% X loo = 304,23 304.23
Transcribed Image Text:3A Periodic Table of 15 Ne 28 14 13 CN Orygen 16.00 Fluorine 19.00 Nen 20.18 Mitrogen tahan moles of Au = mass Au 3x 31.10 = 93 95.3g pter 5 molar mass Au Section 5.1 23 93.3 196.97 6.022 X 10 items .474mol Calculate the following: 4) Gold is often sold in units of troy ounces. There are 31.10 g per troy ounce. I mol items a) How many atoms of gold are in 3.00 troy ounces? molar mass Au = 196/97 31.109 per troy oz .474mot Au . 6.022 x 10 atoms 23 23 =2.85 X 10 a toms Inol Au b) If the current value of gold is $1230 per troy ounce what would it cost to buy 1.516 moles of gold? 1.516 mates Auo 196.97 I troy ounce 31.10g 9.601 Au troyoz %3D Section 5.2 $1230.9.601 =1809.84 串1181×10' Know: 59 Need: #of atoms C: 6(12.01)' 72.06 A: 12 (1.01) 0: 6 (16.00) 96 5) The number of Çarbon atoms in 5.00 g C6H12O6 5.00g 150.18g/mol Mass Molar mass =.0278 mol x 6= • 1665001b68 Cmol 12.12 •I665001668 Coot x 6,022X lotatoms 23. I mot 23 1.00X 10 180.18 189/mol Section 5.3 belo Catoms 6) Determine the mass percent of oxygen in Ba(CIO3)2 percent by mass of elemen't n X molar muss Ba: 137.33 (1:2(35.45) 0:6(16.00) 96. n X 100 molar mass of Com pound 304.23 6.16 96 X 160 = 32% X loo = 304,23 304.23
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