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chemistry

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A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 is 1.577g. what is percent by mas of water in the hydrated calcium sulfate salt

  • chemistry - ,

    water driven off: 1.994-1.577 g

    percentage of water: waterdrivenoff/1.994 * 100

  • chemistry - ,

    what is Aunilinum?

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