Answer:
B. 9
Step-by-step explanation:
The formula of the compound is given as:
9NaCl
Coefficient is the number before the compound. The compound here is made up of sodium and chlorine.
Therefore, we have 9 as the coefficient and it is 9 moles of NaCl.
- The compound have 1 atoms of Na
- Also 1 atom of Cl
Note, NaCl is an ionic compound.