What evidence supports a conservation law?

Question

a) 6 CO2 → C6H12O6 + 6 O2

b) 6 CO2 + 6 H2O + light → C6H12O6 + 6 O2

c) 6 H2O + light → C6H12O6 + 6 O2

d) 6 CO2 → 3 C6H12O6 + 3 O2

Answer 1

The evidence that supports a conservation law is option (a): 6 CO2 → C6H12O6 + 6 O2. This equation shows the conservation of mass, where the total number of atoms of each element in the reactants is equal to the total number of atoms of each element in the products. This supports the conservation of matter, one of the fundamental principles of chemistry.