Hydrochloric acid (HCI) is a strong acid made from two reactive chemicals, hydrogen (H) and chlorine (CI). Palladium (Pd) and platinum (Pt) are rare but valuable metals. Highly reactive chemicals are sometimes stored in
argon (Ar) gas because it does not react with most substances.
Which of these elements is an almost completely nonreactive nonmetal like argon?
A. neon (Ne)
B. chlorine (CI)
C. platinum (Pt)
D. hydrogen (H)

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

d. groundwater flows through the subsoil and deposits minerals.

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google

answeranovulation;