Explanation: RATIO FOR 1 MOLECULE OF ACETIC ACID: 2 carbon atoms : 2 oxygen atoms : 4 hydrogen atoms Since its asking how many for 2 MOLECULES, we double the ATOMS (we multiply all by 2) RATIO FOR 2 MOLECULES OF ACETIC ACID: 4 carbon atoms : 4 oxygen atoms : 8 hydrogen atoms The question only asks for the ratio of carbon atoms to ALL atoms. To calculate all atoms, we add 4 + 4 + 8 = 16 So if there are 4 carbon atoms and the sum of all atoms is 16, out final ratio answer is: B.) 4 : 16 Mark me brainliest please!!