Consider the gas- phase reaction between nitric oxide and bromine at 273^ C i 2 NO(g)+Br 2 (g) longrightarrow2 NOBr(g) The following data for the initial rate of appearance of NOBr were obtained Experiment (M / s) [NO](M) 0.10 [Br 2 ](M) 0.20 Initial Rate 24 1 2 0.25 0.20 150 3 0.10 0.50 60 4 0.350.50 735 (a) Determine the rate law. (b) Calculate the average value of the rate constant for the appearance of NOBr from the four data sets. (c) How is the rate of appearance of NOBr related to the rate of disappearance of Br 2 ? () What is the rate of disappearance of Br 2 when [NO] = 0.075M and [Br 2 ]=0.25M

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answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

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