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Question 600068
JEE Chemistry · Hard

Mole Concept and Stoichiometry: Molarity MCQ

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MolarityHardQuestion 600068

Question

A 30% (by mass) solution of H₂O₂ has density 1.11 g/mL. Molarity (M of H₂O₂ = 34) is:
  1. A
    9.8 M
    Correct
  2. B
    7.8 M
  3. C
    11.4 M
  4. D
    4.7 M

Correct answer

9.8 M

Explanation

M = (% × d × 10) / Mmolar = (30 × 1.11 × 10) / 34 = 333/34 ≈ 9.8 M.

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