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Per NCERT Problem 1.7, what is the molarity of NaOH when 4 g NaOH is dissolved in enough water to form 250 mL solution? (Molar mass NaOH = 40)
A1 M
B4 M
C0.04 M
D0.4 M (= 0.1 mol / 0.250 L)
Answer & Solution
Correct answer: D. 0.4 M (= 0.1 mol / 0.250 L)
Per NCERT Problem 1.7, moles NaOH = 4/40 = 0.1 mol. M = 0.1/0.250 = 0.4 M.
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