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Final

Chapter 1 Examples

2 Pages
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Department
Chemistry
Course Code
CAS CH 131
Professor
Andrei Lapets

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Description
9/14/12 Al 2  3 HCl  ▯AlCl  + 3 O 2 Given 300 g of Al O 2an3 300 g of HCl to produce AlCl  + H O 3 2 How many protons, core and valence electrons, and neutrons are in Al? P = 13 Valence = 3 Core =10 Neutrons = 14 What is the mass % of Al in Al O ?2 3 Al – 27 O – 16 (2(27))/(2(27)+3(16)) = 52.9% What is the balanced reaction? Al O  + 6HCl  ▯2AlCl  + 3H O 2 3 3 2 What is the limiting reagent? 300 g Al O2 31 mole/102 g) = 2.94 mole 300 g HCl (1 mole/36.
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