I can totally relate to your question. I changed majors and took on the responsiblity my husband's 13 y.o. daughter. Although I get her on the weekends, I do however have her for a large chunk of the summer. I have taken summer classes since I started college. They're fast and a little harder, but in my experiences teachers skip some content because there isn't enough time in 6 weeks to complete the full class.
Last summer I took A&P I and II with labs and everyone thought i was crazy especially with a 12 y.o. I took her as often as possible, we sat in back and she kept busy. I don't know how old your children are, but there is daycare on my camps and possibly yours.
Chemistry is a hard class. It does take committment to study time, but so does Nursing school
. If you think you can handle it and have a plan for childcare, then get it out of the way. If it's just not feesable, take it first or second semester. Third and fourth are super hard where I go. Good luck! :hatparty: