What is the reaction rate n2 + 3h2 = 2hn3 if the hydrogen concentration was 10 mol / l during the reaction became 1 mol / l in 2 minutes?

The rate of a chemical reaction is the change in the molar concentration of reagents or reaction products per unit time. Determined by the formula:
V = + (С2 – С1) / (t2 – t1) = + dC / d t, where dC is the molar concentration of the substance per unit time, d t is the change in time. A minus in front of the formula is placed if the reaction rate is calculated by the concentration of reagents (it decreases).
Otsuda
V = – (10 mol / L – 1 mol / L) / 2 min
V = 4.5 mol / l * min
Answer: the reaction rate is 4.5 mol / l * min.