7516
The rate constants calculated in this manner were in good agreement with the available experimental data , and the three - parameter rate - temperature formulae for the temperature range 200 - 1 , 500 K were k ( 1a ) ( T ) = 0 . 32 x 10 ( - 18 ) T ( 1 . 83 ) exp ( 1748 . 54 / T ) , k ( 2a ) ( T ) = 0 . 22 x 10 ( - 19 ) T ( 2 . 19 ) exp ( 1770 . 19 / T ) , k ( 3a ) ( T ) = 0 . 88 x 10 ( - 20 ) T ( 2 . 20 ) exp ( 1513 . 82 / T ) ( in units of cm ( 3 ) molecule ( - 1 ) s ( - 1 ) ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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