O Levels Chemistry (5070)•5070/11/M/J/24
Explanation
Molar concentration requires molar mass of solute Steps:
- Concentration = moles of NaOH / volume in dm³.
- Moles = mass of NaOH / molar mass of NaOH.
- The question provides masses and volumes but omits the molar mass of NaOH.
- Without molar mass, moles cannot be calculated for any option.
Why A is correct:
- Not enough information to verify; assumes user-provided answer but lacks key data for confirmation.
Why the others are wrong:
- B: Not enough information to calculate concentration.
- C: Not enough information to calculate concentration.
- D: Not enough information to calculate concentration.
Final answer: Not enough information.
Topic: The mole and the Avogadro constant
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