An acid is a chemical that
A. donates hydrogen atoms.
B. donates hydrogen ions.
C. donates hydronium ions.
D. accepts hydrogen atoms.
E. dissolves metal.
Answer: B
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Tropical coral reefs support a very diverse and highly populated community, including calcareous algae whose
secretions help "cement" the coral reef together. In this community, the coral reef structure is the algae's ____________ and the algae's job of cementation is its ____________. Fill in the blank(s) with the appropriate word(s).
Tropical Savanna bioregions are found in tropical locations with a dry season
Indicate whether the statement is true or false
Australia's major exports are energy
Indicate whether the statement is true or false
What is the ultimate base level?
A) Continental Divide B) A basalt flow beneath softer sedimentary rocks C) Sea level D) The bottom of a waterfall