Cu(NO3)2(aq)+2NO2(g)+2H2O(l)

Question

What is the number of nitrogen atoms in this chemical equation

Answer 1

take the compounds one at a time. Copper nitrate has 2. The Nitrogen dioxide has 1 but we have a coefficient of 2 in front of the compound This makes 2 + 2 or 4 nitrogen atoms on this side of the chemical equation.