1A_exercise_key_4 - 1 Chapter 4 Exercise Key Chapter 4...

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Chapter 4 Exercise Key 1 Chapter 4 Exercise Key Exercise 4.1 – Balancing Chemical Equations: Balance the following chemical equations. a. P 4 ( s ) + 6 Cl 2 4 PCl 3 ( l ) b. 3 PbO( s ) + 2 NH 3 ( g ) 3 Pb( s ) + N 2 ( g ) + 3 H 2 O( l ) c. P 4 O 10 ( s ) + 6 H 2 O( l ) 4 H 3 PO 4 ( aq ) d. 3 Mn( s ) + 2 CrCl 3 ( aq ) 3 MnCl 2 ( aq ) + 2 Cr( s ) e. C 2 H 2 ( g ) + 5/2 O 2 ( g ) 2 CO 2 ( g ) + H 2 O( l ) or 2 C 2 H 2 ( g ) + 5 O 2 ( g ) 4 CO 2 ( g ) + 2 H 2 O( l ) f. 2 Fe(NO 3 ) 3 ( aq ) + 3 Na 2 CO 3 ( aq ) Fe 2 (CO 3 ) 3 ( s ) + 6 NaNO 3 ( aq ) g. 2 CH 3 NH 2 ( g ) + 9/2 O 2 ( g ) 2 CO 2 ( g ) + 5 H 2 O( l ) + N 2 ( g ) or 4 CH 3 NH 2 ( g ) + 9 O 2 ( g ) 4 CO 2 ( g ) + 10 H 2 O( l ) + 2 N 2 ( g ) Copyright 2004 Mark Bishop
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Chapter 4 Exercise Key 2 Exercise 4.2 – Mass-Mass Equation Stoichiometry: Tetrachloroethene, C 2 Cl 4 , is a colorless liquid used in dry cleaning. Tetrachloroethene is often called perchloroethylene (perc). It can be formed in several steps from the reaction of dichloroethane, chlorine gas, and oxygen gas. The equation for the net reaction is below. 8C 2 H 4 Cl 2 ( l ) + 6Cl 2 ( g ) + 7O 2 ( g ) 4C 2 HCl 3 ( l ) + 4C 2 Cl 4 ( l ) + 14H 2 O( l ) a. Write fifteen different conversion factors that relate moles of one reactant or product to moles of another reactant or product. ⎛⎞ ⎜⎟ ⎝⎠ 2 4 22 4 4 4 4 2 2 3 2 4 2 8 moles C H Cl 8 moles C H Cl 8 moles C H Cl 8 moles C H Cl 8 moles C H Cl or or or or 6 moles Cl 7 moles O 4 moles C HCl 4 moles C Cl 14 moles H O or 22 2 32 4 2 2 3 2 6 moles Cl 6 moles Cl 6 moles Cl 6 moles Cl 7 moles O or or or or 7 moles O 4 moles C HCl 4 moles C Cl 14 moles H O 4 moles C HCl 7 moles O or 4 23 2 24 2 2 2 4 moles C HCl 4 moles C HCl 7 moles O 4 moles C Cl or or or or moles C Cl 14 moles H O 4 moles C Cl 14 moles H O 14 moles H O b. What is the maximum mass of perchloroethylene, C 2 Cl 4 , that can be formed from 23.75 megagrams of dichloroethane, C 2 H 4 Cl 2 ?
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This note was uploaded on 03/03/2012 for the course CHEM 100 taught by Professor Mark during the Fall '06 term at Monterey Peninsula College.

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1A_exercise_key_4 - 1 Chapter 4 Exercise Key Chapter 4...

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