Weak acids only partially ionize. so the retain part of the original molecule. C
Answer:
open system
Coffee held in a cup is an open system because it can exchange matter water vapors and energy heat with the surroundings.
Answer:
Temperature stays constant.
Explanation:
During a phase change, the temperature does not change. Temperature will only change when a phase change is completed.
All objects DO emit and absorb electromagnetic radiation. therefore, true.
