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Question

How do you find the percentage composition of oxygen in sodium hydroxide?


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Solution

Percentage composition:

  1. The mass percentages of each constituent in a compound make up the percentage composition.
  2. It is given by MassofatomwhosepercentagehavetobecalculatedMolarmassofcompound×100
  3. Sodium hydroxide has the chemical formula NaOH having one sodium atom, one oxygen atom, and a hydrogen atom.
  4. Molar mass of NaOH=Mass of a Sodium atoms+Mass of an oxygen atoms+Mass of a hydrogen
  5. Molar mass=23+16+140
  6. Percentage composition of oxygen =1640×100=40%

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