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KVPY2017ChemistrySome Basic Concepts of Chemistry

1.25 ~g of a metal (M) reacts with oxygen completely to produce 1.68 ~g of metal oxide. The empirical formula of the metal oxide is [molar mass of M and O are 69.7 ~g ~mol ⁻¹ and 16.0 ~g ~mol ⁻¹ , respectively]

Options

  1. AM ₂ O
  2. BM ₂ O ₃
  3. CMO ₂
  4. DM ₃ O ₄

Correct answer

B. M ₂ O ₃

Step-by-step solution

1.25 E = 1.68 E +8 E =23.25 n - factor = 69.7 23.25 3 Emprical formula = M ₂ O ₃

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