Question

calculate the mass percent of different elements present in sodium sulphate and na2 s o4​

Answer 1

Answer:

Molecular mass of sodium sulphate (Na

2

SO

4

) is 142 g mole.

The elements present in sodium sulphate are sodium, sulphur, and oxygen.

Mass of sodium : 23×2=46g

Mass of sulphur : 32×1=32g

Mass of oxygen : 16×4=64g

Mass percentage of sodium =

142

32

×100 = 32. 38 % ≈ 32.4 %

Mass percentage of oxygen =

142

64

×100 = 45.05 %

Mass percentage of sulphur = (100 - 32.4 - 45.05) % = 22.55 %

Explanation:

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