You are given a sample of an unknown copper salt. The data collected and recorded in your laboratory notebook are: Start

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You are given a sample of an unknown copper salt. The data
collected and recorded in your laboratory notebook are:
Starting mass of salt: 1.473 g
Mass of filter paper: 0.013 g
Mass of watch glass: 21.342 g
Mass of watch glass + filter paper + copper: 22.548 g
Calculate the mass of copper collected and the percent copper by
mass in the original salt. Assuming the salt was one of the nine
possible unknowns provided in the
procedure document, identify the salt based on your results.
Nine possible unkowns:
1. Copper (II) acetate monohydrate: Cu(C2H3O2)2·H2O
2.Copper (II) chloride anhydrous: CuCl2
3. Copper (II) chloride dihydrate: CuCl2·2H2O
4. Copper (II) nitrate trihydrate: Cu(NO3)2·3H2O
5. Copper (II) oxide: CuO
6.Copper (II) perchlorate hexahydrate: Cu(ClO4)2·6H2O
7.Copper (II) sulfate pentahydrate: CuSO4·5H2O
8.Copper (II) sulfate anhydrous: CuSO4
9.Copper (II) sulfide: CuS