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

Twenty-eight grams of iron react with twenty grams sulfur. The limiting reactant is

A. Sulfur
B. Iron
C. Both react completely
D. Neither reacts

📝 Explanation

Iron provides only 0.5 mole while sulfur provides 0.625 mole. Iron is present in the smaller stoichiometric amount.

📖 Additional Information

  • Sulfur
  • Iron
  • Both react completely
  • Neither reacts

Iron provides only 0.5 mole while sulfur provides 0.625 mole. Iron is present in the smaller stoichiometric amount.

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