How to calculate percentage composition of Sodium hydroxide?
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Step-by-step explanation:
In the case of sodium hydroxide, these are Na = 23, O = 16, H = 1. (You will be given these numbers in the exam.) Next, divide the Ar of oxygen by the Mr of NaOH, and multiply by 100 to get a percentage.
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Answer:
Molar mass of NaOH=23+16+1=40
∴ % composition of oxygen= 16/40 × 100=40%
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