The electronic configurations listed are incorrect. Explain what mistake has been made in each and write correct electronic configurations. x=1s2 2s2 2p4 3p2, y=1s2 2s1 2p1,
z=1s2 2s2 2p5 3s1

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?