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OpenStudy (anonymous):
An empty crucible has a mass of 25.70 g. After some copper(II) sulfate pentahydrate is added, the mass is 28.855 g. What is the mass of the copper(II) sulfate pentahydrate in the crucible?
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OpenStudy (anonymous):
You find 28.855 - 25.70 =3.155 since it is the mass of the crucible and the stuff minus the mass of the crucible.
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