Calculate the empirical formula of the compound
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 of nitrogen and 4.05 of oxygen. Calculate the empirical formula of the compound.
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When 2.55 g of an unknown weak monoprotic acid (HA, molar mass = 85.0 g/mol) is dissolved in 250.0 g of water. Calculate Ka for the unknown acid.
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