In one molecule of sodium sulfate how many percent of it is sulfur?

In one molecule of sodium sulfate how many percent of it is sulfur?
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Answer :

We refer to "molecules" of sodium sulfate as formula units. Theformula is Na2SO4. The molar mass is 142 g/mole. And sulfur (S) is32 out of the entire 142 g. So, percent sulfur is 32/142 (x100%) =22.5%
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