How many molecules are in 2g of O2?

How will the emission of an alpha particle affect the atomic number of an atom

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?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false