%%
%% The LaTeX Companion, 3ed
%%
%% Example 3-3-34 on page I-175 in "Customizing units and quantities".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.0pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{siunitx,xfrac}
\newcommand\sample[1]{#1: \unit{\joule\per\mega\mole\per\K}
   \hfill \qty{5.3}{\kilo\ampere\per\mole\deci\s} \\[5pt]}
%StopShownPreambleCommands

\begin{document}
                                        \sample{A}
\sisetup{per-mode=power-positive-first} \sample{B}
\sisetup{per-mode=fraction}             \sample{C}
\sisetup{fraction-command=\sfrac}       \sample{D}
\sisetup{inter-unit-product=\cdot}      \sample{E}
\sisetup{per-mode=symbol}               \sample{F}
\sisetup{per-mode=repeated-symbol}      \sample{G}
\sisetup{prefix-mode=extract-exponent}  \sample{H}
\end{document}