Since the calculation you want to complete is missing, I can help you by telling you the different mole ratios that you can derive from the chemical equation.
1) Balanced chemical equation (given):
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
2) Mole ratios are give by the coefficients of the balanced chemical equation
6 CO₂ : 6 H₂O : 1 C₆H₁₂O₆ : 6 O₂
3) So, these are some of the mole ratios:
a) mole ratio CO₂ to H₂O = 6:6 = 1:1
b) mole ratio CO₂ to C₆H₁₂O₆ = 6:1
c) mole ratio CO₂ to O₂ = 6:6 = 1:1
d) mole ratio H₂O to O₂ = 6:6 = 1:1
As you see, you can calculate the mole ratio of any two compounds of the formula from the coefficients in the balanced chemical equation.
