Waec Model Questions Vol1 2020 Chemistry Question 4

Practice practical question 4 from the 2020 Waec Model Questions Vol1 Chemistry examination. This question covers Mole Concept .

Waec Model Questions Vol1 2020 Chemistry Practical

Topic: Mole Concept

Question 4 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • practical

A gas sample is collected over water at 298 K. The volume of the gas collected is 0.500 L and its mass is 0.845 g. The atmospheric pressure at the time of collection is 760 mmHg and the vapour pressure of water at 298 K is 23.8 mmHg.

Question Parts

( a )

Calculate the pressure (in atm) exerted by the dry gas.

( b )

Determine the number of moles of the dry gas using the ideal gas equation.

( c )

Calculate the molar mass of the gas (g·mol⁻¹).

( d )

Based on the calculated molar mass, suggest a possible identity for the gas from the list: CO₂, N₂O, CH₄, O₂. State the closest match.

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About This Question

This is Waec Model Questions Vol1 2020 Chemistry Question 4. It is one of the practical questions from the 2020 Waec Model Questions Vol1 Chemistry examination.

The question covers Mole Concept .

View More Waec Model Questions Vol1 2020 Chemistry Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

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