1. Identify the elements and their atomic masses:
* Nitrogen (N): 14.01 g/mol
* Hydrogen (H): 1.01 g/mol
* Carbon (C): 12.01 g/mol
* Oxygen (O): 16.00 g/mol
2. Count the number of atoms of each element:
* Nitrogen (N): 2
* Hydrogen (H): 8 (4 x 2)
* Carbon (C): 1
* Oxygen (O): 3
3. Multiply the number of atoms of each element by its atomic mass:
* Nitrogen: 2 atoms * 14.01 g/mol/atom = 28.02 g/mol
* Hydrogen: 8 atoms * 1.01 g/mol/atom = 8.08 g/mol
* Carbon: 1 atom * 12.01 g/mol/atom = 12.01 g/mol
* Oxygen: 3 atoms * 16.00 g/mol/atom = 48.00 g/mol
4. Add the masses of all the elements together:
28.02 g/mol + 8.08 g/mol + 12.01 g/mol + 48.00 g/mol = 96.11 g/mol
Therefore, the formula mass of ammonium carbonate ((NH₄)₂CO₃) is 96.11 g/mol.
