Question

3 h₂o
h: ________
o: ________
total: ________

Explanation:

Step1: Count hydrogen atoms

In one $H_2O$ molecule, there are 2 hydrogen atoms. Since there are 3 $H_2O$ molecules, $2\times3 = 6$.

Step2: Count oxygen atoms

In one $H_2O$ molecule, there is 1 oxygen atom. For 3 $H_2O$ molecules, $1\times3=3$.

Step3: Calculate total atoms

Total atoms = hydrogen atoms + oxygen atoms, so $6 + 3=9$.

Answer:

H: 6
O: 3
Total: 9