Final answer:
The equation NH4NO2 → N2 + 2H2O indicates that for each mole of NH4NO2 decomposed, 3 moles of products (1 mole of N2 and 2 moles of H2O) are produced, equating to 3 times Avogadro's number of molecules.
Step-by-step explanation:
The total number of molecules represented by the chemical equation NH4NO2 → N2 + 2H2O can be calculated by understanding the stoichiometry of the reaction. Stoichiometry is based on the balanced chemical equation and the concept of the mole, which is the most useful quantity for counting particles. In this specific equation, for each mole of NH4NO2 decomposed, one mole of N2 and two moles of H2O are produced.
Since 1 mole of any substance contains Avogadro's number of molecules (6.022 × 1023 molecules), if we start with 1 mole of NH4NO2, we will generate 1 mole of N2 and 2 moles of H2O, which equals a total of 3 moles of products. Therefore, this corresponds to 3 × Avogadro's number of molecules.