chemistry

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A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed and found to have a mass of 160 grams. What is the formula for the hydrate?


CuSO4 * 10 H2O
CuSO4 * 7 H2O
CuSO4 * 5 H2O
CuSO4 * 2 H2O
CuSO4 * H2O

  • chemistry -

    I'd take the difference between the hydrated and dehydrated sample and then divide by the molar mass of one water molecule H2O. Like so:

    (250 grams - 160 grams)/Molar Mass H2O

    This will allow me to find out how many water molecules there were.

  • chemistry -

    CuSO4 * 5 H2O

  • Chemistry -

    ur a butt

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