Which equation best represents conservation of matter?(1 point)

To determine which equation best represents the conservation of matter, we need to ensure that the number of atoms of each element on the reactant side equals the number of atoms on the product side.

Let's analyze each option:

1. **3H2O + 3CO2 → C6H12O6 + 6O2**
- Reactants:
- H: 6 (from 3 H2O)
- C: 3 (from 3 CO2)
- O: 9 (6 from H2O + 6 from CO2 = 9)
- Products:
- H: 12 (from C6H12O6)
- C: 6 (from C6H12O6)
- O: 12 (6 from C6H12O6 + 6 from O2 = 12)
- **Not balanced.**

2. **6H2O + 6CO2 → C3H6O3 + 3O2**
- Reactants:
- H: 12 (from 6 H2O)
- C: 6 (from 6 CO2)
- O: 24 (6 from H2O + 12 from CO2 = 18)
- Products:
- H: 6 (from C3H6O3)
- C: 3 (from C3H6O3)
- O: 9 (3 from C3H6O3 + 6 from O2 = 9)
- **Not balanced.**

3. **6H2O + 10CO2 → C6H12O6 + 4O2**
- Reactants:
- H: 12 (from 6 H2O)
- C: 10 (from 10 CO2)
- O: 26 (6 from H2O + 20 from CO2 = 26)
- Products:
- H: 12 (from C6H12O6)
- C: 6 (from C6H12O6)
- O: 26 (6 from C6H12O6 + 8 from O2 = 26)
- **Not balanced.**

4. **6H2O + 6CO2 → C6H12O6 + 6O2**
- Reactants:
- H: 12 (from 6 H2O)
- C: 6 (from 6 CO2)
- O: 24 (6 from H2O + 12 from CO2 = 18)
- Products:
- H: 12 (from C6H12O6)
- C: 6 (from C6H12O6)
- O: 24 (6 from C6H12O6 + 6 from O2 = 24)
- This equation is balanced.

Therefore, the equation that best represents the conservation of matter is:

**6H2O + 6CO2 → C6H12O6 + 6O2.**