Question

Calculate the percentage composition of sodium sulphate, whose formula is Na2SO4 (Atomic mass Na=23,S=32,O=16

Answer 1

Explanation:

The molar mass of sodium sulphate is 2(23)+32+4(16)=46+32+64=142g/mol

Mass percentage =

Mass of Na

2

SO

4

Mass of oxygen

×100

The mass percentage of oxygen in sodium sulphate =

142

64

×100=45.07%.

Answer 2

Explanation:

Here is your answer

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