To determine how many sulfur atoms are needed to produce 1 molecule of carbon disulfide (CS₂) and 2 molecules of hydrogen sulfide (H₂S), we can analyze the chemical formulas:
- For 1 molecule of CS₂, you need 2 sulfur atoms.
- For 2 molecules of H₂S, you need 2 sulfur atoms (1 sulfur atom per H₂S molecule).
Now, let's add the sulfur atoms required:
- Sulfur for CS₂: 2 sulfur atoms
- Sulfur for 2 H₂S: 2 sulfur atoms
Total sulfur atoms needed = 2 + 2 = 4 sulfur atoms.
Therefore, the answer is d. 4.