Rate constant of a first order reaction from the time for 20% decomposition

1. A.
   $5.6\times10^{-3}$ minute$^{-1}$
2. B.
   $4.5\times10^{-3}$ minute$^{-1}$
3. C.
   $6.5\times10^{-3}$ minute$^{-1}$
4. D.
   $7.2\times10^{-3}$ minute$^{-1}$

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1. A.
   $5.6 \times 10^{-3}$ min⁻¹
2. B.
   $4.5 \times 10^{-3}$ min⁻¹
3. C.
   $6.5 \times 10^{-3}$ min⁻¹
4. D.
   $9.69 \times 10^{-3}$ min⁻¹

Tap an option to check your answer.