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The empricial formula of a compound is CH2O. Its molecular weight is 90. Calculate the molecular formula of
the compound. (Atomic weight C = 12, H = 1, O = 16)
  • a)
    C3H7O3
  • b)
    C4H6O3
  • c)
    C3H6O3
  • d)
    C4H2O3
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The empricial formula of a compound is CH2O. Its molecular weight is 9...
CH2O=12+2(1)+16
=30
90g/30g=3
=C3H6O3
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Most Upvoted Answer
The empricial formula of a compound is CH2O. Its molecular weight is 9...

To determine the molecular formula of the compound, we need to find the ratio between the empirical formula and the molecular weight.
1. Calculate the empirical formula weight:
- Carbon (C): 12 * 1 = 12
- Hydrogen (H): 1 * 2 = 2
- Oxygen (O): 16 * 1 = 16
Total empirical formula weight: 12 + 2 + 16 = 30
2. Calculate the ratio between the empirical formula weight and the molecular weight:
Molecular weight: 90
Ratio: 90 / 30 = 3
3. Multiply the subscripts in the empirical formula by the ratio:
- Carbon (C): 1 * 3 = 3
- Hydrogen (H): 2 * 3 = 6
- Oxygen (O): 1 * 3 = 3
4. Write the molecular formula using the new subscripts:
C3H6O3
Therefore, the molecular formula of the compound is C3H6O3 (Option C).
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The empricial formula of a compound is CH2O. Its molecular weight is 90. Calculate the molecular formula ofthe compound. (Atomic weight C = 12, H = 1, O = 16)a)C3H7O3b)C4H6O3c)C3H6O3d)C4H2O3Correct answer is option 'C'. Can you explain this answer?
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