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12-06-2017
Chemistry

contestada

What is the percent by mass of water in Na2SO4 x 10H2O

Respuesta :

dec77cat dec77cat

12-06-2017

M(Na₂SO₄*10H₂O)=322.196 g/mol
M(H₂O)=18.0153 g/mol

w(H₂O)=10M(H₂O)/M(Na₂SO₄*10H₂O)

w(H₂O)=10*18.0153/322.196=0.5591 (55.91%)

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