15. At 300 K, the following reaction is found to obey the rate law: Rate = k[NOCI]?: 2NOCI 2NO + CI, Consider the three postulated mechanisms given below. Then choose the response that lists all those that are possibly correct and no others. Mechanism 1 NOCI NO + CI slow CI + NOCI NOCI, fast NOCI, + NO 2NO + Cl2 fast Overall: 2NOCI 2NO + Cl, Mechanism 2 2NOCI NOCI, + NO slow NOCI, NO + Cl, fast Overall: 2NOCI 2NO + Cl2

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.