Answer:
about 79% (79.04369332 to be exact)
Explanation:
Percent composition=(Molar mass of element x amount of it)/Molar mass of compound x 100
Br= 3 x 79.9/303.25 x100=79.04369332
A process called respiration. This process is carried out in organelles in the cell<span> called the Mitochondria.</span>
A...because both of them(carbon and oxygen)are nonmetal