By Bus: Take bus number 68, 69, 14, 35 from the Jerusalem central bus station or bus number 7, 9 from the downtown area, get off the bus at The Hebrew University, Edmond J. Safra Campus, Givat Ram, and walk to Los Angeles (or other relevant bldg, as on the map below).
By Car: When using the the standard entrance (coming to the main Jerusalem entrance) use the Jerusalem municipality map linked below or the one found here. Within the campus, park either below (to the east of) the Los Angeles/Philadelphia/Aronberg/Casali bldgs, or above Beit Belgia. Don't forget to ask in advance for an entrance permit from your host within the university.
The Institute of Chemistry is spread over several buildings. The main secretariat is in the Los Angeles bldg. The map includes: