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# \$2.00Integrated Rate Law (2 questions) 1st order vs 2nd order

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When do you use integrated rate equation (1st order) and when do you use integrated rate equation (2nd order)?

Question 1. N2O5 (g)-->N2O4 (g) + 1/2O2 (g). If 2.50moles of N2O5 (g) are placed in a 5.00L container, how many moles of N2O5 would remain after 1.00minute? K=1.68x10^-2s^-1. Question 2. 2NOBr (g)-->2NO (g) + Br2 (g). K=0.810L/mol*sec. If there is an initial concentration of NOBr=4.00x10^-3M, how many seconds does it take to use up 1.50x10^-3M NOBr?

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• Posted on Jul 03, 2011 at 12:45:45PM
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Preview: ... (g) according to integrated rate equation (2nd order) k=0.810l/mol*sec 1/1.50x10^-3 ...

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