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Class 10 > Learn Class IX-X Tuition > How to calculate the mass percent of different elements...
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How to calculate the mass percent of different elements present in sodium sulphate (Na2SO4)

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Na=23,S=32,O=16 (Na)*2 +S+ (O)*4 = (23)*2 +32+ (16)*4 =142
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For any element the mass percent = (Mass of that element / Molecular mass of compound) * 100
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(23+23)/142*100 ie (atomic mass of na divided by total mass of sodium sulphate compound )*100
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For any element = (Mass of that element / Molecular mass of compound) * 100
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