Final answer:
The molar mass of ammonium nitrate (NH4NO3) is 80.06 g/mol. This value is used in calculating chemical reactions and supports the law of conservation of mass, where the mass of the decomposed products equals the original mass.
Step-by-step explanation:
The molar mass of ammonium nitrate (NH4NO3) can be calculated by adding up the atomic masses of all the atoms within a molecule of the compound. According to the problem statement, we know the following information:
Molar mass of NH4NO3 = 80.06 g/mol
Molar mass of N2O = 44.02 g/mol
Molar mass of H2O = 18.02 g/mol
Therefore, using the provided molar masses, we can confirm that the molar mass of ammonium nitrate is indeed 80.06 g/mol, which is consistent with the law of conservation of mass, as the mass of the products from the decomposition of ammonium nitrate equals the original mass of the ammonium nitrate.