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1a. At 573 K, gaseous NO2 decomposes, forming NO(g) and O2. If a vessel containing NO2(g)...

1a. At 573 K, gaseous NO2 decomposes, forming NO(g) and O2. If a vessel containing NO2(g) has an initial concentration of 0.056 mol/L, how long will it take for 75% of the NO2(g) to decompose? The decomposition of NO2(g) is second-order in the reactant, and the rate constant for this reaction, at 573 K, is 1.1 L/mol · s.

= ___ s

1b. The decomposition of ammonia on a metal surface to form N2 and H2 is a zero-order reaction. At 873 °C, the value of the rate constant is 1.9x10^-3 mol/L · s. How long will it take to completely decompose 1.0 g of NH3 in a 1.0-L flask?

= ___ s

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