What is the molarity of \( \mathrm{NaOH} \) solution if \( 250 \mat...

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What is the molarity of \( \mathrm{NaOH} \) solution if \( 250 \mathrm{~mL} \) of it
P contains \( 1 \mathrm{mg} \) of \( \mathrm{NaOH} \) ?

W
(a) \( 10^{-1} \mathrm{M} \)
(b) \( 10^{-2} \mathrm{M} \)
(c) \( 10^{-4} \mathrm{M} \)
(d) \( 10^{-3} \mathrm{M} \)
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