Waec Model Questions Vol1 2024 Chemistry Question 2

Practice practical question 2 from the 2024 Waec Model Questions Vol1 Chemistry examination. This question covers Periodic Table, Oxidation states, Stoichiometry .

Waec Model Questions Vol1 2024 Chemistry Practical

Topics: Periodic Table Oxidation states Stoichiometry

Question 2 WAEC_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • practical

A 1.250 g sample of an unknown metallic element (M) is placed in a crucible, heated strongly, and completely converted to its oxide, MOₓ. After cooling, the mass of the oxide is 1.680 g. The metal is known to form a trivalent oxide of the type M₂O₃. Using the data, answer the following questions.

Question Parts

( a )

Calculate the atomic mass of the metal (M) in g mol⁻¹. Show all steps.

( b )

Using the periodic table, suggest a possible identity for the metal. State the group/period and justify your choice.

( c )

State one experimental source of error that could affect the calculated atomic mass.

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About This Question

This is Waec Model Questions Vol1 2024 Chemistry Question 2. It is one of the practical questions from the 2024 Waec Model Questions Vol1 Chemistry examination.

The question covers Periodic Table, Oxidation states, Stoichiometry .

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