Final answer:
The mass of 0.500 mol NH3 is calculated by multiplying the number of moles by its molar mass, resulting in 8.515 grams of ammonia.
Step-by-step explanation:
The mass of 0.500 mol NH3 can be calculated using the molar mass of ammonia (NH3). The molar mass of NH3 is the sum of the masses of its constituent atoms, which is approximately 14.01 g/mol for nitrogen (N) and 3 x 1.01 g/mol for hydrogen (H), giving a total of 17.03 g/mol. To find the mass, you multiply the number of moles by the molar mass:
Mass of NH3 = number of moles × molar mass of NH3 = 0.500 mol × 17.03 g/mol = 8.515 g.
Thus, the mass of 0.500 mol of ammonia is 8.515 grams.