<!-- This is what works with Quarto -->
<script>
  MathJax = {
    loader: {load: ['[tex]/mhchem', '[tex]/physics']},
    tex: {
      tags: 'ams',  // should be 'ams', 'none', or 'all'
      packages: {'[+]': ['mhchem','physics']}
    }
  };
</script>