To analyze the balanced chemical equation for the decomposition of calcium carbonate (CaCO₃):
Reactants: 1 molecule of CaCO₃:
- Calcium (Ca) = 1 atom
- Carbon (C) = 1 atom
- Oxygen (O) = 3 atoms
Total atoms in reactants = 1 (Ca) + 1 (C) + 3 (O) = 5 atoms
Products: 1 molecule of CaO and 1 molecule of CO₂:
- From CaO:
- Calcium (Ca) = 1 atom
- Oxygen (O) = 1 atom
- From CO₂:
- Carbon (C) = 1 atom
- Oxygen (O) = 2 atoms
Total atoms in products = 1 (Ca) + 1 (C) + 1 (O from CaO) + 2 (O from CO₂) = 5 atoms
Now, let's compare the number of atoms on each side:
- Total atoms in reactants = 5
- Total atoms in products = 5
Difference: Total atoms in products - Total atoms in reactants = 5 - 5 = 0
So, there are no more atoms in the products than in the reactants.
The answer is: A0.