Math & Science ⇒ siunitx | Space after Number

[ghostanime2001]

How do I set default to adding a space after the number and just before the unit? For example I want this:

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\SI[group-digits = false]{0.09975}{\mol\per\L}

to have the same space after the number and before the unit as typing

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\text{0.09975 mol/L}

[josephwright]

Simply

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\sistup{number-unit-product = \text{ }}

should work with the current release (v2.3 series).

[ghostanime2001]

How can I have a tighter space around the multiplication dot?

[josephwright]

I assume you want something like

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\sisetup{tight-spacing}

[ghostanime2001]

Doesn't produce any effect..

[josephwright]

Please post an example of what you are doing.

[ghostanime2001]

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\documentclass[fleqn]{article}
\usepackage{fullpage}
\usepackage[margin=1in]{geometry}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amstext}
\usepackage{wasysym}
\usepackage{type1cm}
\usepackage{xfrac}
\usepackage{xspace}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}
\usepackage{pifont}
\usepackage{ulem}
\usepackage{enumitem} 
\usepackage[makeroom]{cancel}
\usepackage{siunitx}
\usepackage{mathtools} 
\usepackage[version=3]{mhchem}
\usepackage{chemmacros}
\usepackage{fix-cm}
\setlength{\parindent}{0in}
\setlength{\mathindent}{0pt}
\allowdisplaybreaks
\pagestyle{empty}
\sisetup{inter-unit-product={}\cdot{},number-unit-product=\text{ },tight-spacing=true}
\begin{document}
\SI[group-digits = false]{0.5}{\mol\per\L}
\end{document}

[josephwright]

The "tight-spacing" option will only work with the 'normal' \times set up. If you are using a centred dot, you need to alter the set up you use to

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\sisetup{inter-unit-product = \cdot}

[ghostanime2001]

perfect thank you sir