The equation below is unbalanced. C3H8+O2->CO2+H2O

When the equation below is correctly balanced, what is the coefficient of O2?

A. 2
B. 3
C. 4
D. 5

Please answer. No links please!!!

The data below were determined for the reaction shown below. s2o82– + 3i – (aq) → 2so42– + i3– expt. # [s2o82–] (m) [i –] (m) initial rate 1 0.038 0.060 1.4 × 10 – 5 m/s 2 0.076 0.060 2.8 × 10 – 5 m/s 3 0.076 0.030 1.4 × 10 – 5 m/s the rate law for this reaction must be: