2NH4NO3 --> 2N2 + O2 + 4H2O

Question

What mass of H2O can be formed from the decomposition of 12.0 g of NH4NO3?

Answer 1

mols NH4NO3 = grams/molar mass
Use the coefficients in the baalanaced equation to convert mols NH4NO3 to mols H2O.
Now convert mols H2O to grams H2O. g = mols x molar mass