Calculate the Kovats retention index for an unknown using the retention times 1.4 min1.4 min for CH4,CH4, 12.2 min12.2 min for octane, 15.9 min15.9 min for the unknown, and 17.5 min17.5 min for nonane.

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

Non renewable resources like petroleum eventually

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?