The molarity of the solution containing \( 2.8 \% \) mass-volume solution of \( \mathrm{KOH} / \...

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The molarity of the solution containing \( 2.8 \% \) mass-volume solution of \( \mathrm{KOH} / \) (Given atomic mas \( \mathrm{K}-39 \) ) is:
(1) \( 0.1 \mathrm{M} \)
(2) \( 0.5 \mathrm{M} \)
(3) \( 0.2 \mathrm{M} \)
(4) \( 1 \mathrm{M} \)
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