Guess the song I remember years ago someone told me I should take caution when it comes to love I did

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

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?

How many moles are in 123.0 grams of kclo4?