The molecular weight of an ionic compound is 118.9 g/mol. the ions in the unknown are sodium, oxygen, and bromine. what is the name of the unknown oxyanion?

Answer is: the name of the unknown oxyanion is hypobromite.

M(NaBrOₓ) = 118.9 g/mol; molecular weight of an ionic compound.
M(Na) = 23 g/mol; atomic weight of sodium.
M(Br) = 79.9 g/mol; atomic weight of bromine.
M(O) = 16 g/mol; atomic weight of oxygen.
M(Na) + M(Br) + M(O) = 23 g/mol + 79.9 g/mol + 16 g/mol.
M(Na) + M(Br) + M(O) = 118.9 g/mol, so compound is NaBrO and oxyanion is BrO⁻.

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

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