CO2 - Carbon (C): 1 atom, Oxygen (O): 2 atoms, C6H12O6 - Carbon (C): 6 atoms Hydrogen (H): 12 atoms, Oxygen (O): 6 atoms, 3Na2SO4 - Sodium (Na): 2 × 3 = 6 atoms, Sulfur (S): 1 × 3 = 3 atoms Oxygen (O): 4 ×3 =12 atoms,

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