Build your practice set

Find exactly what you need to practice.

Search across chemistry topics, concepts, chapters, and questions.

Viewing Shared Question View All Feed

Stoichiometry Mole–Mass Stoichiometry

1

Choose the best answer

What mass of MgO is produced when 0.5 mol Mg burns in excess O₂? 2Mg + O₂ → 2MgO

Verified Answer & Explanation⌄

Correct Answer: D) 20 g

Concept Explanation

Mg and MgO have a 1:1 molar ratio. 0.5 mol Mg produces 0.5 mol MgO. Molar mass of MgO ≈ 40 g mol⁻¹. Mass = 0.5 × 40 = 20 g.

Topic: Mole–Mass StoichiometryPractice more Mole–Mass Stoichiometry MCQs →