Half-life of a first order reaction from its rate constant, or the rate constant from its half-life

1. A.
   $4.3 \times 10^{-5}$ sec$^{-1}$
2. B.
   $7.7 \times 10^{-5}$ sec$^{-1}$
3. C.
   $6.9 \times 10^{-5}$ sec$^{-1}$
4. D.
   $8.4 \times 10^{-5}$ sec$^{-1}$

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1. A.
   0.0727 minute
2. B.
   0.1454 minute
3. C.
   0.2181 minute
4. D.
   0.4362 minute

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1. A.
   5.0 day
2. B.
   16.5 day
3. C.
   28.0 day
4. D.
   9.0 day

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1. A.
   $1.733\times10^{-2}\,\text{min}^{-1}$
2. B.
   $1.951\times10^{-2}\,\text{min}^{-1}$
3. C.
   $1.423\times10^{-2}\,\text{min}^{-1}$
4. D.
   $1.256\times10^{-2}\,\text{min}^{-1}$

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1. A.
   125 s
2. B.
   250 s
3. C.
   100 s
4. D.
   150 s

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1. A.
   140 s
2. B.
   290 s
3. C.
   390 s
4. D.
   500 s

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1. A.
   2.0
2. B.
   4.5
3. C.
   14.2
4. D.
   22.0

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1. A.
   $5.5 \times 10^{-2} \times s^{-1}$
2. B.
   $0.5 \times 10^{-3} \times s^{-1}$
3. C.
   $5 \times 10^{-2} \times s^{-1}$
4. D.
   $5 \times 10^{-3} \times s^{-1}$

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1. A.
   $0.0347$
2. B.
   $0.5$
3. C.
   $13.86$
4. D.
   $34.67$

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1. A.
   $17.56$ minutes
2. B.
   $33.97$ minutes
3. C.
   $51.50$ minutes
4. D.
   $68.70$ minutes

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1. A.
   $1.76 \times 10^{-3}\ \mathrm{s^{-1}}$
2. B.
   $2.31 \times 10^{-3}\ \mathrm{s^{-1}}$
3. C.
   $6.93 \times 10^{-3}\ \mathrm{s^{-1}}$
4. D.
   $4.61 \times 10^{-3}\ \mathrm{s^{-1}}$

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1. A.
   $0.231$ s
2. B.
   $2.31$ s
3. C.
   $23.1$ s
4. D.
   $231$ s

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