Which of the following is the correct chemical formula for nitrogen trihydride?

• A. NH_3
• B. N_3H_3
• C. N_3H
• D. 3NH

Answer: (A)

Verified step by step guidance

1. Understand the name 'nitrogen trihydride': 'Nitrogen' refers to the element nitrogen (N), and 'trihydride' means there are three hydrogen (H) atoms bonded to it.
2. Recall the naming convention for binary compounds where prefixes indicate the number of atoms: 'tri-' means three, so 'trihydride' means three hydrogens.
3. Write the chemical formula by placing the symbol for nitrogen first (N), followed by the number of hydrogen atoms indicated by the prefix: N followed by H with a subscript 3, which is \(N H_3\).
4. Check the options given and identify which matches the correct formula \(N H_3\) exactly, without extra subscripts or coefficients.
5. Confirm that \(N H_3\) is the correct molecular formula for nitrogen trihydride, commonly known as ammonia.