The Missing Number in the Equation 4NH₃ + [ ]O₂

question 58

Multiple Choice

The missing number in the equation 4NH₃ + [ ]O₂ → 4NO + 6H₂O is

• A) 1.
• B) 2.
• C) 5.
• D) 10.

---

Definitions:

Wall Lizard

A common name for several species of lizards in the genus Podarcis, known for living on walls and other vertical surfaces.

Subject

The main topic or area of focus in a discussion, study, or piece of work.

Proposition

An expression or declaration that conveys an evaluation or viewpoint, potentially being either correct or incorrect.

Subject

The main person, place, thing, or idea that is being discussed or described in a sentence or text.