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Question 600061
JEE Chemistry · Hard

Mole Concept and Stoichiometry: Cross-multiplied Stoichiometry MCQ

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Cross-multiplied StoichiometryHardQuestion 600061

Question

If P₄ + 5O₂ → P₄O₁₀, then 6.2 g of P₄ (M=124) reacts with how many grams of O₂?
  1. A
    4 g
  2. B
    8 g
    Correct
  3. C
    16 g
  4. D
    32 g

Correct answer

8 g

Explanation

n(P₄) = 6.2/124 = 0.05 mol. From stoichiometry: 0.05 mol P₄ × 5 mol O₂ = 0.25 mol O₂. Mass = 0.25 × 32 = 8 g.

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