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student12

December 22nd, 2006 02:37

Stochiometry

1)Calculate the amount of metal ions, in mol, in 5g of
a) Sodium carbonate
b) hydrated nickel sulfate

2) Gypsum is hydrated clacium sulfate (CaSO4.xH2O). A residue of 5.65g of anhydrous calcium sulfate is obtained by heating 7.15g of gypsum. Determine the empirical formula of gypsum.

Please show working.

student12

January 5th, 2007 17:27

Anyone out there?

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