H3O+ or OH- concentration of a weak acid or base

1. A.
   $1 \times 10^{-5}$
2. B.
   $1.5 \times 10^{-5}$
3. C.
   $2.0 \times 10^{-5}$
4. D.
   $3.0 \times 10^{-5}$

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1. A.
   $3.0\times10^{-4}\ \text{M}$
2. B.
   $6.0\times10^{-4}\ \text{M}$
3. C.
   $2.0\times10^{-4}\ \text{M}$
4. D.
   $4.0\times10^{-4}\ \text{M}$

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1. A.
   $1.34 \times 10^{-4}$
2. B.
   $1.54 \times 10^{-4}$
3. C.
   $1.80 \times 10^{-4}$
4. D.
   $1.70 \times 10^{-4}$

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1. A.
   $3.1\times10^{-2}\,\text{mol L}^{-1}$
2. B.
   $4.5\times10^{-3}\,\text{mol L}^{-1}$
3. C.
   $9.0\times10^{-2}\,\text{mol L}^{-1}$
4. D.
   $1.2\times10^{-3}\,\text{mol L}^{-1}$

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1. A.
   $K_{b}.c$
2. B.
   $\sqrt{K_{b} \cdot c}$
3. C.
   $\sqrt{\frac{K_{b}}{c}}$
4. D.
   $\sqrt{K_{b}}$

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1. A.
   $1.34 \times 10^{-3}$ M
2. B.
   $1.68 \times 10^{-3}$ M
3. C.
   $2.12 \times 10^{-3}$ M
4. D.
   $2.34 \times 10^{-3}$ M

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