Will a 4 lb chicken be done after 3 hours at 325 degrees in the oven?

No, a 4 lb chicken will not be done after 3 hours at 325 degrees in the oven. The safe internal temperature for cooked chicken is 165 degrees Fahrenheit, and it typically takes about 20-25 minutes per pound to cook a chicken in the oven. Therefore, a 4 lb chicken would need to cook for approximately 80-100 minutes at 325 degrees in order to reach the safe internal temperature.