for questions 3 and 4, consider the following reaction:2 NO2 (g) → N2O4 (g)The rate law for the reaction is as follows:rate = k [NO2]2 where k = 0.0195 M–1·s–1 at 375 °CFor a reaction that starts with 2.2 moles of NO2 gas in a 0.40 L container, what is the concentration of N2O_4 in the container after one half-life of the reaction? Give your answer in units of mol/L with two significant figures.If the reaction starts with NO_2 at a concentration of 2.0 M, what will be the concentration after 60 seconds? Choose the closest answer.A 0.50 MB 0.60 MC 0.70 MD 0.80 ME 0.90 M