C) 0.350 grams of molecular nitrogen and 0.451 grams of water are formed when 1.00 grams of ammonium nitrate completely decomposes to form product.
D) Yes, the calculation demonstrates conservation of mass. The total mass of the reactants (1.00 grams of ammonium nitrate) is equal to the total mass of the products (0.350 grams of N2 + 0.451 grams of H2O), which indicates that mass is conserved during the chemical reaction.