Carbon dioxide subliming is an example of which of the following? A. Physical change B. Mass change C. Nuclear change D. Chemical change

Carbon dioxide subliming refers to the process where solid carbon dioxide (dry ice) transitions directly into carbon dioxide gas without passing through a liquid phase. This transformation involves a change in the state of matter but **does not alter the chemical composition** of the substance. - **Physical Change:** Involves changes in physical properties (like state) without altering the chemical structure. Sublimation is a classic example. - **Mass Change:** Generally refers to processes where mass is lost or gained, which isn't the primary focus in sublimation. - **Nuclear Change:** Involves changes to an atom's nucleus, which is not related to sublimation. - **Chemical Change:** Involves a change in the chemical composition, which doesn't occur during sublimation. **Answer:** A. Physical change