Added several chemistry packages; added chemistry chapter

004/codex-004.tex

@@ -35,7 +35,7 @@
  \cfoot{Page \thepage}
 \renewcommand{\footrulewidth}{0.5pt}
 
-% Includ two- or three-column sections
+% Include two- or three-column sections
 \usepackage{multicol}
 
 % Stop resetting the footnote count after each chapter
@@ -93,6 +93,9 @@
 % Just for issue #004 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \usepackage{pifont}
 \usepackage{qrcode}
+\usepackage{mhchem}
+\usepackage{chemformula}
+\usepackage{chemfig}
 
 %%%% Document Information %%%%%
 \author{Kenneth John Odle}
@@ -283,6 +286,40 @@ As I said way back in the first issue, I define a hack as ``an appropriate appli
 
 
 
+\chapter{Chemistry in \LaTeX{}}
+
+\section{Package \texttt{hmchem}}
+
+For typesetting chemical equations:
+
+\ce{CO2 + C -> 2 CO}
+
+\ce{Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2-}
+
+\ce{1/2H2O}
+
+\section{Package \texttt{chemformula}}
+
+For typesetting chemical compounds and reactions:
+
+\ch{KCr(SO4)2 * 12 H2O}
+
+\ch{[Cu(NH3)4]^2+}
+
+\ch{$2n$ Na + $n$ Cl2 -> $2n$ NaCl} \par
+
+\ch{\{[CH2=CH-CH2]- <-> {}[CH2-CH=CH2]- \}} \par
+
+\section{Package \texttt{chemfig}}
+
+For drawing molecules:
+
+Glucose:
+
+\chemfig{?(-[:190]OH)-[:-50](-[:170]OH)-[:10](-[:-55,0.7]OH)
+-[:-10](-[6,0.7]OH)-[:130]O-[:190]?(-[:150,0.7]-[2,0.7]OH)}
+
+
 \chapter{A \texttt{git} Workflow}