Chemistry C2- Percentage composition

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Percentage composition is just a way to describe what proportions of the different elements there are in a compound.

If you have the formula of a compound, you should be able to work out thepercentage by mass of an element in it.


The formula for sodium hydroxide is NaOH. It contains three different elements:NaO and H. But the percentage by mass of each element is not simply 33.3 per cent, because each element has a different relative atomic mass. You need…


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