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Question 600018
JEE Chemistry · Medium

Mole Concept and Stoichiometry: Molecular Formula MCQ

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Molecular FormulaMediumQuestion 600018

Question

The empirical formula of a compound is P₂O₅ and its molar mass is 284 g/mol. Its molecular formula is:
  1. A
    P₂O₅
  2. B
    P₄O₁₀
    Correct
  3. C
    P₃O₇·₅
  4. D
    P₆O₁₅

Correct answer

P₄O₁₀

Explanation

EF mass = 2×31 + 5×16 = 62+80 = 142. n = 284/142 = 2. Molecular formula = (P₂O₅)₂ = P₄O₁₀.

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