Waec Model Questions Vol1 2019 Chemistry Question 2

Practice practical question 2 from the 2019 Waec Model Questions Vol1 Chemistry examination. This question covers Periodic Table .

Waec Model Questions Vol1 2019 Chemistry Practical

Topic: Periodic Table

Question 2 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • practical

A student weighed a sample of an unknown metal carbonate (MCO₃) and recorded 2.00 g. The sample was heated in a crucible until a constant mass was obtained. The mass of the residue (metal oxide, MO) was 1.30 g. The decomposition reaction is: MCO₃(s) → MO(s) + CO₂(g) Using the data provided, answer the following questions.

Question Parts

( a )

Calculate the mass of CO₂ released during the heating.

( b )

Determine the number of moles of CO₂ evolved (M(CO₂) = 44.01 g mol⁻¹).

( c )

From the stoichiometry of the reaction, calculate the molar mass of the metal M (atomic mass, since the metal is monatomic).

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About This Question

This is Waec Model Questions Vol1 2019 Chemistry Question 2. It is a practical question from the 2019 Waec Model Questions Vol1 Chemistry examination.

The question covers Periodic Table .

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