1. A sample of nitrogen gas is in a container with a variable volume. When the volume of the container is 0.50 liters, the pressure is 6.0 atm. The volume of the container is changed to 2.5
liters, keeping the temperature constant. What is the new pressure of nitrogen gas?

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?