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The rate constant for the first-order decomposition of a compound A in the reaction 2 A...

The rate constant for the first-order decomposition of a compound A in the
reaction 2 A  P is k, =3.56 x 10-7 s-1 at 25°C. What is the half-life of A? What will be the
pressure, initially 33.0 kPa at (a) 50 s, (b) 20 min, (c) 20 h after initiation of the reaction?

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