<ol>
<li><p>Chemistry major pre-meds are a dime a dozen, so no, they won’t take rigor into account</p></li>
<li><p>Bad, at least if you want to do med school. Med schools want to see that you can handle a tough courseload AND do well. For a chem PhD, they probably won’t care, as long as you do well in chemistry classes and have solid research experience</p></li>
</ol>