If taking a yearlong chemistry sounds like a burden, taking it as a semester long course at a CC would be even harder. And a summer course, typically compacting the 16 weeks CC course into 6 weeks, would be even harder.
There are kids who can do this easily. My daughter with more strength in humanity cannot. In her pre-AP level CC general chemistry course, she had to submit a full lab report every week in addition to heavy load of homework and preparing for 3 midterms and 1 final, with a quiz every week without a formal test. The material wasn’t a joke! I took Chem 1A&1B in my time and aced both of them (it required to be in top ~10% for an A then), I couldn’t help her homework beyond the first 2~3 weeks because I couldn’t figure out them well enough myself.
Your d took bio this year. So ask her if she knows how new concepts are stored in a brain. Unless she has some previous chemistry classes (not including Physical Science because the puny chemistry concepts in there will be covered in the first hour or two.), 6 weeks is not enough time to grow enough neuron structure to accommodate and internalize all the new information and concept for a humanities kid, even though she doesn’t have any other commitment.