The rate constant for this first-order reaction is 0.0259 s-1 at 300 °C. A products If...

Question

Question

The rate constant for this first-order reaction is 0.0259 s-1 at 300 °C. A products If the initial mass of A is 17.74 g, calc

Answer 1

Answer #1

Answer

2.428g

Explanation

Integrated rate law for the first order reaction is

ln[A]_t = -kt + ln[A]₀

where,

[A]_t = concentration of reactant at time t, ?

k = rate constant, 0.0259s^-1

[A]₀ = concentration of reactant at initial , 17.74g

t = 1.28min = 76.8s

2.303 log[A]_t= - kt + 2.303log[A]₀

2.303log[A]_t = - 0.0259s^-1 × 76.8s + 2.303log(17.74g)

2.303log(17.74g/[A]_t) = 1.9891

log(17.74g/[A]_t) = 0.8637

17.74g/[A]_t = 7.306

[A]_t = 2.428 g

Answer 2

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