A chemist mixed two samples together: a gray liquid that boils at 103°C and a
colorless gas that boils at 19°C. She
analyzed the results and found two ending
substances. One of the ending substances
was a pink liquid. This ending substance is
made up of the repeating group of atoms
shown above. Which of the diagrams to the
left shows the repeating groups of atoms
that make up the samples the chemist
mixed together?