In mammals, mature red blood cells do not have mitochondria. instead of using oxygen to produce atp, they use a form of anaerobic respiration known as lactic acid fermentation to form atp. based on the information just given, what is the role of the mitochondria in cells that do contain mitochondria? a: use lactic acid to make atp b: use oxygen to make atp c: use atp to make oxygen

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.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.