Question

1. nitrogen trichloride ______
2. boron monocarbide ______
3. dinitrogen trioxide ______
4. phosphorus pentafluoride ______
5. dihydrogen monoxide ______
6. sulfur dibromide ______
7. tetrahydrogen diboride ______
8. oxygen difluoride ______
9. carbon disulfide ______
10. nitrogen monoxide ______

Explanation:

12. boron monocarbide

Step1: Identify elements and prefixes

Boron (B) and Carbon (C). "Mono-" means 1 for carbon.

Step2: Write formula

Combine symbols with subscripts. Boron is 1 (implied), carbon is 1 (mono-). So formula is $BC$.

Step1: Identify elements and prefixes

Nitrogen (N) with "di-" (2), Oxygen (O) with "tri-" (3).

Step2: Write formula

Use subscripts from prefixes. So $N_2O_3$.

Step1: Identify elements and prefixes

Phosphorus (P) (no prefix, so 1), Fluorine (F) with "penta-" (5).

Step2: Write formula

Combine as $PF_5$.

Answer:

$BC$

13. dinitrogen trioxide