The usual name is nitrous acid - HNO2.
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The chemical formula for copper(I) nitrite is CuNO2.
The chemical formula for sodium nitrite is NaNO2.
The chemical formula of the polyatomic ion nitrite is NO2-.
Nitrite is a polyatomic ion with an overall charge of -1. The formula for nitrite is NO2-.
The chemical formula of a nitrite ion is NO2-. It consists of one nitrogen atom (N) and two oxygen atoms (O) with a -1 charge.