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Calculate \( \left[\mathrm{H}^{+}\right],\left[\mathrm{HCOO}^{-}\right] \)and \( \left[\mathrm{OCN}^{-}\right] \)in a solution
\( \mathrm{P} \) that contains \( 0.1 \mathrm{M} \mathrm{HCOOH}\left(\mathrm{K}_{\mathrm{a}_{1}}=2.4 \times 10^{-4}\right) \) and

W
\( 0.1 \mathrm{MHOCN}\left(\mathrm{K}_{\mathrm{a}_{2}}=4 \times 10^{-4}\right) \)
(1) \( \left[\mathrm{H}^{+}\right]=8 \times 10^{-3} \mathrm{M} \)
(2) \( \left[\mathrm{HCOO}^{-}\right]=3 \times 10^{-3} \mathrm{M} \)
(3) \( \left[\mathrm{OCN}^{-}\right]=5 \times 10^{-3} \mathrm{M} \)
(4) All of these
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