# Tag Info

Accepted

### How to write physical units

Instead of \mathrm many people misused \ce, because it was shorter to type. Seeing this, the author of ...
• 3,296
Accepted

### Green checkmark or red X with Mathjax/mhchem?

CAVEAT: Due to the use of Unicode, the below may not render properly on all systems, especially mobile devices. (Thanks, Martin!) Green boxed checkmark ...
• 16.9k
Accepted

• 42.7k
Accepted

### What additional formatting features are available to MathJax (possibly via \require{})?

As described in the MathJax documentation, any of the core MathJax extensions can be loaded this way (though this can be restricted via the MathJax configuration).

### What additional formatting features are available to MathJax (possibly via \require{})?

Command Grouping Enable with: \require{begingroup} Environment: \begingroup ... \endgroup Quite a few things are possible ...
• 42.7k

### Green checkmark or red X with Mathjax/mhchem?

You can use the following for a green check mark since it is implemented in amssymb: $\Large\color{\green}{\checkmark}$ ...
• 42.7k
Accepted

### Unknown Notations

It really is tricky to judge what is official and what is not. Here is my take on the several issues. This is not something that should be implemented in mhchem, as I think it is just sloppy ...
• 42.7k

### FAQ: How can I format math/chemistry expressions on Chemistry Stack Exchange?

(4) Learning by example The MathJax and mhchem syntax in the left-hand side must be enclosed in single dollar signs $...$ for an inline (smaller) equation, or ...

### What additional formatting features are available to MathJax (possibly via \require{})?

2-D Reaction Networks Enable with: \require{AMScd} Environment: \begin{CD} ... \end{CD} Construct two-dimensional grids ...

### How to solve mhchem/MathJax rendering problems

So, after failing to reproduce the problem in another browser, I have discovered my own answer. I want to leave this here for other folks who encounter this issue. The problem is in how you tell ...
• 41.8k

### Green checkmark or red X with Mathjax/mhchem?

A meta answer to a meta question, making it meta². Be careful with conventions like this. They are not as intuitive and universal as you might think. I've seen ✘ Artificial Flavours written on ...
• 3,296
Accepted

### Should we pay attention to possible bugs of MathJax in the apps?

Yes and no. Yes - if the differences are cosmetic. One example of this is \dfrac vs. \frac, the latter of which is better ...
• 41.8k
Accepted

### Using mathrm versus rm MathJax index formatting

\rm shouldn't be used at all as it's a deprecated command existing solely for the backward compatibility. Historically, the two-letter commands such as ...
• 35.8k
Accepted

### Extra spacing before mhchem super/subscripts

This doesn't look right. $\mathrm{|{}^1H|}$ $\mathrm{|{}^1H|}$ and $\mathrm{|\ce{^1H}|}$ $\mathrm{|\ce{^1H}|}$ should give the ...
• 3,296

### Chemical formulas with fractional numbers are displayed wrongly

As a workaround, you could use $\ce{$0.5$\,H2O}$ to get $\ce{$0.5$\,H2O}$

### What additional formatting features are available to MathJax (possibly via \require{})?

Cancellation Lines Enable with: \require{cancel} Commands: \cancel{}, \bcancel{}, ...

### How can I enable MathJax in chat?

Based on the same principle, this little bookmarklet loads cancel in addition to mhchem: ...
• 42.7k

### Chemical formulas with fractional numbers are displayed wrongly

Or you can use $\ce{1/2\,H2O}$ to get $\ce{1/2\,H2O}$.
• 42.7k
Accepted

### Mhchem broken on mobile

This bug was caused by /sites route in the stackexchange api not returning MHChemMathJax in markdown_extensions due to ...
• 101
Accepted

### Why two different print styles for the x's?

You are mixing chemistry typeset with maths typeset; I don't think that the mhchem module is set up for this. There is probably much more wrong than what you consider a bug. Assuming $K$ is an ...
• 42.7k

### Chemical formulas with fractional numbers are displayed wrongly

This issue has been solved since mid of 2016. $\ce{0.5H2O}$ renders as $\ce{0.5H2O}$. Short background: MathJax is NOT LaTeX. MathJax is a complete re-...
• 3,296
Accepted

### MathJax in the Android App

Unfortunately the app uses a different version than the website. That does include the recent updates to mhchem, especially the \pu{...} command. While ...
• 42.7k