If anyone here is in AP. EX chemistry and has a finished 4.3.5 practice chemical reactions work sheet, I would be oh so grateful if you could send that to me. I attached the first question for cross reference

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?