acetylene hydrogen chloride vinyl chloride the reaction H-C=C-H PVC pipe elementary step 0 #1 12/ elementary step 2 k(1) = 9.23 x 10-9 (s-1) k(2) = 1.77 x 1011 (s-') 140. 1 AG 120- 12 kJ/mol 90 10 kJ/mol 80 AG(1) 60 40 120 kJ/mol 20 0 R- P -20 -40 reaction coordinate The mechanism shows the order that the bonds are actually broken and made in a chemical reaction. The mechanism consists of individual (simpler) elementary chemical reactions, neither of which in their own is very useful, but together, in the proper sequence, transform the reactants of the overall chemical reaction into products. When we look at an overall reaction energy diagram we see that each elementary mechanistic step has an energy maximum that the reaction system must attain to proceed. The energy required to attain the energy maximum is the activation energy, AGI, for each step. Shown below is the chemical equation, the mechanism and a reaction energy diagram for formation of vinyl chloride from acetylene and hydrogen chloride. The energy diagram is schematic rather than accurate, but it is useful for learning. Vinyl chloride is an important component of polyvinyl chloride (PVC), which is heavily used in construction engineering. The mechanism has two steps (1 and 2). Which of these is the rate determining step? O Step 1 O Step 2

AICIS CHICI H₂ Lindlar's Cat.

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C.A. Is a 16 month old child wing 18 pounds who is diagnosed with an upper respiratory infection her doctor prescribed cefaclor by mouth 20 mg/kg/day In divided doses every eight hours how many MG will a child receive and each dose?in divided doses every eight hours how many MG will a child receive at each dose

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