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Chemistry · Some Basic Concepts of Chemistry

हिन्दी

An organic compound contains \( 40\% \) carbon, \( 6.67\% \) hydrogen, and the remaining is oxygen. If its molecular mass is \( 180\text{ g mol}^{-1} \), its molecular formula is:

  1. \( \text{C}_2\text{H}_4\text{O}_2 \)
  2. \( \text{CH}_2\text{O} \)
  3. \( \text{C}_6\text{H}_{12}\text{O}_6 \)
  4. \( \text{C}_{12}\text{H}_{22}\text{O}_{11} \)

Correct answer · Option 3

\( \text{C}_6\text{H}_{12}\text{O}_6 \)

Explanation

Empirical formula is \( \text{CH}_2\text{O} \) with empirical mass \( 30\text{ g/mol} \). \( n = \frac{180}{30} = 6 \). Molecular formula = \( (\text{CH}_2\text{O})_6 = \text{C}_6\text{H}_{12}\text{O}_6 \).
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