To calculate the molar mass of ammonia sulfide, we need to add up the atomic masses of each atom in the compound. Here's the step-by-step calculation:

1. Identify the atoms and their atomic masses:

- Nitrogen (N) = 14.01 grams per mole (g/mol)

- Hydrogen (H) = 1.01 g/mol

- Sulfur (S) = 32.06 g/mol

2. Determine the number of atoms:

- Ammonia sulfide has 1 nitrogen atom, 3 hydrogen atoms, and 1 sulfur atom.

3. Calculate the total molar mass:

- Molar mass of ammonia sulfide = (1 x 14.01 g/mol N) + (3 x 1.01 g/mol H) + (1 x 32.06 g/mol S)

- Molar mass = 14.01 g/mol + 3.03 g/mol + 32.06 g/mol

- Molar mass of ammonia sulfide = 50.10 g/mol

Therefore, the molar mass of ammonia sulfide is 50.10 grams per mole (g/mol).