Select all of the compounds from the following list. If it is not a compound, then state
what it is.
a. H2O
b. HCO3
c. 02
d. H2
e. Li2+
f. C6H12O6
g. H+
Most chemical elements exist in the environment as _____.
a. usable forms in soil and rock
b. usable forms in water
c. unusable forms in soil and rock
d. unusable forms in water