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Anil Arrabole · Answer 1 · 2018-03-31T14:45:13+0000

We determine the percent by mass of water in the compound by dividing the mass of water by the total mass. The total mass of Na2SO4.10H2O is equal to 322 g. The mass of water is 180 g.

percent by mass of water = (180 / 322)*(100 %) = 55.9%

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