How can I change from old style numbers to normal looking numbers when using cursive modes such as \emph ? My problem occurs when I try to make a reference using the style=chem-acs package, because the numbers does not in any way look like the ones in prober articles. Here is my preamble:
\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}
\usepackage[backend=bibtex,natbib=true,style=chem-acs]{biblatex}
\usepackage[journal=rsc]{chemstyle}
\usepackage[margin=1in]{geometry}
\usepackage{amsmath}
\usepackage[toc,page]{appendix}
\usepackage{float}
\usepackage{dblfnote}
\usepackage{multirow}
\usepackage{pbox}
\usepackage{booktabs}
\usepackage{threeparttable}
\usepackage{graphicx}
\usepackage{booktabs}
\begin{document}
\em{1 2 3 4 5 6 7 8 9}
\end{document}


\em{1 2}is incorrect syntax. Anyway, you're telling TeX to print numbers in italics. – egreg Nov 21 '16 at 21:31