To determine which of the given substances is an organic compound, let's first recall what defines an organic compound. Organic compounds are primarily characterized by the presence of carbon atoms and typically include carbon-hydrogen (C-H) bonds.
Let's analyze each of the given options:
1. Ammonia (NH[tex]\(_3\)[/tex]):
- Composed of nitrogen (N) and hydrogen (H).
- No carbon atoms are present.
- Therefore, ammonia is not an organic compound.
2. Calcium sulfide (CaS):
- Composed of calcium (Ca) and sulfur (S).
- No carbon atoms are present.
- Therefore, calcium sulfide is not an organic compound.
3. Octane (C[tex]\(_8\)[/tex]H[tex]\(_{18}\)[/tex]):
- Composed of carbon (C) and hydrogen (H).
- Contains carbon-carbon (C-C) and carbon-hydrogen (C-H) bonds.
- Octane is a hydrocarbon, a common type of organic compound.
4. Sulfur trioxide (SO[tex]\(_3\)[/tex]):
- Composed of sulfur (S) and oxygen (O).
- No carbon atoms are present.
- Therefore, sulfur trioxide is not an organic compound.
From the analysis, only octane [tex]\(\left( C _8 H _{18}\right)\)[/tex] contains carbon atoms and forms the necessary C-H bonds typical of organic compounds.
Thus, the organic compound among the given options is:
_octane (C[tex]\(_8\)[/tex]H[tex]\(_{18}\)[/tex])_
