\( 29.2 \%(\mathrm{w} / \mathrm{w}) \mathrm{HCl} \) stock solution ...

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\( 29.2 \%(\mathrm{w} / \mathrm{w}) \mathrm{HCl} \) stock solution has a density of \( 1.25 \mathrm{~g} \) \( \mathrm{mL}^{-1} \). The molecular weight of \( \mathrm{HCl} \) is \( 36.5 \mathrm{~g} \mathrm{~mol}^{-1} \). The
\( \mathrm{P} \) volume \( (\mathrm{mL}) \) of stock solution required to prepare a 200

W) \( \mathrm{mL} \) solution of \( 0.4 \mathrm{M} \mathrm{HCl} \) is :
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