It’s like AP chemistry but wayyyy more intense and with more competition for top grades.
To give you a comparison, you covered AP Chemistry with 5 periods per week over 10 months.
Chem 117 will be AP Chem,with 3 periods a week over 4 months. That’s how intense it is. You hav to hit the ground running.
(and in reality, you cover more ground in 4 months than in 10 months of HS).