Final answer:
Abigail Adams passed away on October 28, 1818, at the age of 73 in Quincy, Massachusetts. She is remembered for her letters to President John Adams.
Step-by-step explanation:
Abigail Adams passed away on October 28, 1818. She was the wife of John Adams, the second president of the United States, and is well-known for her extensive correspondence with her husband, which has been preserved and serves as an important historical resource. Abigail Adams died in Quincy, Massachusetts at the age of 73 years old. Her eloquent letters are a significant contribution to our understanding of the Revolutionary War period and the early years of the United States.