Answer
Nine (9) atoms of oxygen are in three molecules of NaHCO₃.
Step-by-step explanation
Given that:
The chemical formula for the compound is NaHCO₃
What to find:
The number of atoms of oxygen in three molecules of NaHCO₃.
Solution:
Concept: The chemical formula of a compound shows the number of each atom present in its molecule.
As per the given chemical formula, there are 1 sodium atom, 1 hydrogen atom, 1 carbon atom, and 3 oxygen atoms present in one molecule of NaHCO₃.
The number of atoms of oxygen in three molecules of NaHCO₃ will be (3 x 3) = 9 atoms of oxygen.
Therefore, nine (9) atoms of oxygen are in three molecules of NaHCO₃.