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A colourless crystalline compond has the following percentage composition.sulphur 24.24%,nitrogen 21.21,% ,hydrogen 6.06%,and the rest is oxygen.detrrmine the empirical formula of compound.if the molecular mass is 132 what is the molecular formula of the compound?
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A colourless crystalline compond has the following percentage composit...
Percentage Composition and Empirical Formula

  • Given percentage composition of colourless crystalline compound

  • Sulphur: 24.24%

  • Nitrogen: 21.21%

  • Hydrogen: 6.06%

  • Oxygen: rest

  • To find empirical formula, we need to determine the ratio of atoms present in the compound

  • Assuming 100 g of the compound, mass of each element can be calculated

  • Sulphur: 24.24 g

  • Nitrogen: 21.21 g

  • Hydrogen: 6.06 g

  • Oxygen: 100 - (24.24 + 21.21 + 6.06) = 48.49 g

  • Next, convert mass of each element into moles

  • Sulphur: 24.24 g / 32.06 g/mol = 0.755 mol

  • Nitrogen: 21.21 g / 14.01 g/mol = 1.514 mol

  • Hydrogen: 6.06 g / 1.01 g/mol = 6.0 mol

  • Oxygen: 48.49 g / 16.00 g/mol = 3.031 mol

  • Divide each mole value by the smallest mole value to get the ratio of atoms

  • Sulphur: 0.755 mol / 0.755 mol = 1

  • Nitrogen: 1.514 mol / 0.755 mol = 2

  • Hydrogen: 6.0 mol / 0.755 mol = 8

  • Oxygen: 3.031 mol / 0.755 mol = 4

  • The empirical formula of the compound is therefore SNO2H8



Molecular Formula

  • The molecular mass of the compound is given as 132

  • The empirical formula mass can be calculated by adding the atomic masses of the elements in the empirical formula

  • SNO2H8: (32.06 + 14.01 + 16.00x2 + 1.01x8) g/mol = 121.15 g/mol

  • To find the molecular formula, divide the molecular mass by the empirical formula mass

  • 132 g/mol / 121.15 g/mol = 1.09

  • Rounding to the nearest whole number, the molecular formula of the compound is S2N4O8H16

Community Answer
A colourless crystalline compond has the following percentage composit...
SN2H8O4
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A colourless crystalline compond has the following percentage composition.sulphur 24.24%,nitrogen 21.21,% ,hydrogen 6.06%,and the rest is oxygen.detrrmine the empirical formula of compound.if the molecular mass is 132 what is the molecular formula of the compound?
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