Question

The first-order rate constant for the decomposition of N2O5N2O5, 2N2O5(g)→4NO2(g)+O2(g)2N2O5(g)→4NO2(g)+O2(g) at 70∘C∘C is 6.82×10−3 s−16.82×10−3 s−1....

The first-order rate constant for the decomposition of N2O5N2O5,

2N2O5(g)→4NO2(g)+O2(g)2N2O5(g)→4NO2(g)+O2(g)

at 70∘C∘C is 6.82×10−3 s−16.82×10−3 s−1. Suppose we start with 2.50×10−2 molmol of N2O5(g)N2O5(g) in a volume of 1.6 LL .

Part A

How many moles of N2O5N2O5 will remain after 5.0 minmin ?

Express the amount in moles to two significant digits.

Part B

How many minutes will it take for the quantity of N2O5N2O5 to drop to 1.6×10−2 molmol ?

Express your answer using two significant figures.

Part C

What is the half-life of N2O5N2O5 at 70∘C∘C?

Express the half-life in seconds to three significant digits.

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The first-order rate constant for the decomposition of N2O5N2O5, 2N2O5(g)→4NO2(g)+O2(g)2N2O5(g)→4NO2(g)+O2(g) at 70∘C∘C is 6.82×10−3 s−16.82×10−3 s−1....
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