Final answer:
The hand placement for adult CPR is on the sternum and one hand is used.
Step-by-step explanation:
For adult CPR, the recommended hand placement is on the sternum, specifically the lower half. One hand is utilized to perform chest compressions. This technique ensures effective and direct pressure on the chest, promoting blood circulation and aiding in the revival of the individual experiencing cardiac arrest.
The sternum serves as a central point for compressions, and the use of a single hand simplifies the process while maintaining the necessary force for optimal chest compression depth. Proper hand placement and technique are vital components of cardiopulmonary resuscitation, contributing to the chances of successful intervention during a life-threatening emergency.