Calculate the root mean square velocity of the CH4 molecules in a sample of CH4 gas at 273 K and at 546 K.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.

If a sample of radioactive isotopes takes 600 minutes to decay from 400 grams to 50 grams, what is the half-life of the isotope?

Compare and contrast an assemblage and a pollen fingerprint by defying both and giving examples of each from the chapter.