Aphysician examines a patient who complains of breathing problems. she finds fluctuations in the patient’s blood pressure and heart rate. the physician thinks it’s because of a brain injury. which part of the brain is affected? a. cerebellum b. cerebrum c. medulla oblongata d. midbrain e. pons

b.

hoped i

explanation:

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.