Chemistry NMDCAT MCQs Moles and Avogadro's Numbers Moles and Avogadro’s Numbers
nmdcat.online July 2, 2026

During the reaction 2Mg + O₂ → 2MgO, complete oxidation of 48 g magnesium forms

A. 40 g MgO
B. 80 g MgO
C. 120 g MgO
D. 160 g MgO

📝 Explanation

Forty-eight grams of magnesium equal two moles, producing two moles of MgO. The mass becomes 80 g.

📖 Additional Information

  • 40 g MgO
  • 80 g MgO
  • 120 g MgO
  • 160 g MgO

Forty-eight grams of magnesium equal two moles, producing two moles of MgO. The mass becomes 80 g.

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