Which chemical equation is a model of a decomposition reaction? A. 2NaCl → 2Na + Cl2
B. 3Na + FeBr3 + 3NaBr + Fe
C. 2Mg + O2
2Mgo
D. AgNO3 + NaCl → AgCl + NaNO3

Define a is a tiny pavket of energy

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?