What feature makes water a polar molecule? a. a water molecule is negatively charged. b. the middle of the water molecule contains opposing charges. c. the ends of the water molecule have opposite electrical charges. d. a water molecule is positively charged.

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.