_ (blank) _ is a waste product that uses the most energy to produce. Select one: a. Ammonia b. Carbon dioxide c. Uric acid d. Urea e. Water

Who is better, messi or cristiano, i need this for a chemistry class. asap

50 pts plz what is the physical state of matter of baking soda.

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump