1. How many moles of CdBr2 are in a 39.25 gram sample of CdBr2?
2. How many atoms of cobalt are in a 0.39 mole sample of Co(C2H3O2)3?
3. What is the mass in milligrams of chlorine in 3.9 x 1019 molecules of Cl2?
4. How many grams of aluminum are in 0.58 moles of Al2O3·2H2O?
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