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The empirical formula and molecular mass of a compound are CH20 and 180g respectively. What will be the molecular formula of the compound?(a) C9H1809, (b) CH20 (c) C6Hi206 (d) C2H402" "

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To find the molecular formula of the compound, we first need to determine the ratio between the empirical formula and the molecular formula. Given: Empirical formula: CH2O Molecular mass: 180 g/mol The empirical formula represents the simplest whole-number ratio of atoms present in the compound....
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To find the molecular formula of the compound, we first need to determine the ratio between the empirical formula and the molecular formula.

Given:

  • Empirical formula: CH2O
  • Molecular mass: 180 g/mol

The empirical formula represents the simplest whole-number ratio of atoms present in the compound. To find the molecular formula, we need to determine how many times the empirical formula needs to be multiplied to obtain the molecular mass.

  1. Calculate the molar mass of the empirical formula: Molar mass of CH2O=12.01 g/mol+2×1.01 g/mol+16.00 g/molMolar mass of CH2O=12.01g/mol+2×1.01g/mol+16.00g/mol Molar mass of CH2O=12.01 g/mol+2.02 g/mol+16.00 g/molMolar mass of CH2O=12.01g/mol+2.02g/mol+16.00g/mol Molar mass of CH2O=30.03 g/molMolar mass of CH2O=30.03g/mol

  2. Determine the ratio between the molecular mass and the molar mass of the empirical formula: Ratio=Molecular massMolar mass of CH2ORatio=Molar mass of CH2OMolecular mass Ratio=180 g/mol30.03 g/molRatio=30.03g/mol180g/mol Ratio≈6Ratio≈6

  3. Multiply the subscripts of the empirical formula by the ratio to find the molecular formula: Molecular formula=(C1H2O1)×6Molecular formula=(C1H2O1)×6 Molecular formula=C6H12O6Molecular formula=C6H12O6

So, the correct answer is:

(c) C6H12O6

 
 
 
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