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Molar mass of NaOH = 39.99 g per mole
No. of moles of NaOH = 15 / 39.99 = 0.375 moles
Molarity of NaOH = No. of moles of NaOH / Volume of NaOH in L
Thus, molarity of NaOH = 0.375 / 100 = 0.00375 mole per dm3 = 0.00375M
(Answer is C)
Note: 1 L = 1 dm3
M is the unit for molarity
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