1 answer

Stion 13 of 18 > The rate constant for this first-order reaction is 0.130 s-at 400...

Question:

stion 13 of 18 > The rate constant for this first-order reaction is 0.130 s-at 400 °C. A products How long, in seconds, would
stion 13 of 18 > The rate constant for this first-order reaction is 0.130 s-at 400 °C. A products How long, in seconds, would it take for the concentration of A to decrease from 0.800 M to 0.270 M? AAGD E R T Y U T O P

Answers

For first order reaction ,

T = time period

K = rate constant

A° = initial conc.

At = final conc.

T=2.303 / K * [ log A° / A​​​​​​t ]

= 2.303 / 0.13 * [ log 0.8/ 0.27 ]

= 2.303 / 0.13 * log ( 2.96 )

= 2.303 * 0.47 / 0.13 sec

= 8.35 sec ( answer )

.

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