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I've had a look at the other double subscript error questions here and they don't seen to solve my error. When I simplify what I want the suggested answer works, but then I don't get what I would like to display.

\documentclass[11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath,amsthm,amsfonts,amssymb,amscd}
\usepackage{chemfig}
\usepackage[version=4]{mhchem}
\usepackage{chemmacros}
\begin{document}
\begin{equation*}
\begin{split}
n_{\ce{NH3}}=n_{\ce{NH3}_\text{initial}}-n_{\ce{HCl}}=0.3\text{ milimoles}\\
\end{split}
\end{equation*}
\end{document}

What I'd like it to have the moles of NH3 subscripted by the word initial. If I remove the \ce command it works but messes up the representation of the NH3.

  • 3
    Try adding an extra brace layer: n_{\ce{NH3}}=n_{{\ce{NH3}}_\text{initial}}-n_{\ce{HCl}}=0.3\text{ milimoles}. – Peter Grill Mar 5 '18 at 6:41
  • 4
    I'm voting to close this question as off-topic because the question was solved in the comments. – Phelype Oleinik Mar 5 '18 at 11:25
  • @Phelype-Oleinik is there a way I can close it? – SvenskTacoma Mar 6 '18 at 11:51
  • @SvenskTacoma When I voted to close the question, other users received a notification to vote to close (or not). When 5 users voted to close, the question was put [on hold] (see the tag appended to the title?). If the question stays on hold for enough time, it will be closed automatically. – Phelype Oleinik Mar 6 '18 at 11:59