| http://www.w3.org/ns/prov#value | - Examples of the Na compounds include oxides such as Na2O and Na2O2, hydroxides such as NaOH, halides such as NaCl and NaF, nitrates such as NaNO3, sulfates such as Na2SO4, carbonates such as Na2CO3 and NaHCO3, oxalates such as Na2C2O4, and acetates such as Na(CH3COO).
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