<p>Hello, I was wondering, is it important to take Chem 20L at the same time as Chem 20B? Or can it be taken the next quarter, while taking Chem 30A? This is because the class is closed, so I can't get in. Thanks</p>
<p>You can take it anytime. It honestly does not matter when or w/ what class. Its fine if you take it w/ Chem 30A- I know some ppl who don't take any chem labs until they were finished w/ Chem 30C. 20L covers the basics and introduction to lab materials so its fine whenever you want to take it.</p>