Time or amount left in a first order reaction from its half-life

1. A.
   4760 year
2. B.
   8640.26 year
3. C.
   2880.15 year
4. D.
   11526.48 year

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1. A.
   $\frac{1}{8}$
2. B.
   $\frac{1}{9}$
3. C.
   $\frac{1}{16}$
4. D.
   $\frac{1}{64}$

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1. A.
   15 minute
2. B.
   20 minute
3. C.
   25 minute
4. D.
   33 minute

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1. A.
   4.12 minute
2. B.
   7.32 minute
3. C.
   9.97 minute
4. D.
   12.05 minute

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1. A.
   46.60 min
2. B.
   66.46 min
3. C.
   79.68 min
4. D.
   88.00 min

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1. A.
   $0.023\ \mathrm{mol\,dm^{-3}}$
2. B.
   $0.035\ \mathrm{mol\,dm^{-3}}$
3. C.
   $5.25\ \mathrm{mol\,dm^{-3}}$
4. D.
   $6.25\ \mathrm{mol\,dm^{-3}}$

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1. A.
   $1/2$
2. B.
   $1/4$
3. C.
   $1/8$
4. D.
   $3/4$

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1. A.
   $0.159\ \mathrm{mol\,dm^{-3}}$
2. B.
   $0.0159\ \mathrm{mol\,dm^{-3}}$
3. C.
   $1.05\ \mathrm{mol\,dm^{-3}}$
4. D.
   $0.759\ \mathrm{mol\,dm^{-3}}$

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1. A.
   $3$ hour
2. B.
   $4$ hour
3. C.
   $5$ hour
4. D.
   $10$ hour

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1. A.
   $23.23$ minute
2. B.
   $14.41$ minute
3. C.
   $18.52$ minute
4. D.
   $34.4$ minute

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1. A.
   $193.2$ s
2. B.
   $150.5$ s
3. C.
   $300.0$ s
4. D.
   $170.4$ s

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1. A.
   $0.25$ g
2. B.
   $0.33$ g
3. C.
   $0.125$ g
4. D.
   $0.0625$ g

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