Question

how many compounds are there?

Explanation:

Step1: Identify compounds

A compound is a substance made of two or more different elements. The first structure (O - C) has two different elements (O and C), so it's a compound. The second structure (Cl - Cl) has only one type of element (Cl), so it's a molecule of an element, not a compound.

Step2: Count compounds

Only the O - C structure is a compound. So the number of compounds is 1.

Answer:

1