It is d because the law was passed around 1976 I am not sure but this is the best estimate
ANSWERS:
They are both ionic compounds.
These compounds are made up of
cations (positively-charged ion) and either
or
anions (negatively-charged ions).
Their names both end in -ic acid.
Acids are named based on their anion. With acids like these where the anion is attached to a hydrogen cation, we name such acids with the the suffix “-ic”.
They both contain polyatomic ionic.
and
are both polyatomic ions.
"Poly-" = many
"ions" = have a + or - charge
So, yes, these are ions that are made up of several atoms (not just one atom like
)
I believe it is K or rather potassium
B - Many Agricultural practices bear some pretty bad impacts on the environment. A, C and D are incorrect.