Written to compare before and after we get
A. V1/n1 = V2/n2
B. n1/V1 = n2/V2

Why does his teacher ask him to balance the equation by including the correct coefficient

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:

What causes the appearance of lines in a emission spectrum