Neco 2025 Chemistry Question 37

Practice objective / multiple choice question 37 from the 2025 Neco Chemistry examination.

Neco 2025 Chemistry Objective / Multiple Choice Medium Difficulty

Question 37 NECO • 2025 • CHEMISTRY • objective

A 200 g sample of water (molar mass \(18.0\ \text{g mol}^{-1}\)) has a vapour pressure of \(30.0\ \text{kPa}\) at \(25\ ^\circ\text{C}\). When \(71.5\ \text{g}\) of a non‑volatile solute is dissolved in the water, the vapour pressure falls to \(27.0\ \text{kPa}\) at the same temperature. Assuming ideal behaviour, calculate the molar mass of the solute.

Correct Answer A. 58 \text{ g mol}^{-1}

B. 73 \\text{ g mol}^{-1}

C. 62 \\text{ g mol}^{-1}

D. 45 \\text{ g mol}^{-1}

Correct Answer

Correct Option:

58 \text{ g mol}^{-1}

This is Neco 2025 Chemistry Question 37. It is one of the objective questions from the 2025 Neco Chemistry examination.

Difficulty level: Medium .

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