The chemical formula of nitrous acis is HNO 2 and the chemical formula of Sulphourous acid is H2SO3.


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Nitrous acid  = H N O2
sulphurous acid  = H2 SO3

no its sulphu rous acid
sorry by mistake..
its ok yr
there is no mistake. sulfur same as sulphur. sulphurous = sulfurous . alternative spellings equivalent
but generally we use 1 one