Germanium to which 1018 cm-3 as atoms have been added is an extrinsic semiconductor at room temperature, and virtually all the as atoms may be thought of as being ionized (i. e., one charge carrier exists for each as atom). (a) is this material n-type or p-type

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

The density of the block of iron is lees than the density of mercury but the density of the block of iron is greater than the density of water