Question

25.0g of Zinctrioxocarbonate(iv) was heated very strongly to a constant mass. Calculate the mass of zinc oxide residue

Answer 1

The IUPAC name is ZnCO3.

ZnCO3 ==> ZnO + CO2
mols ZnCO3 = g/molar mass = ?
1 mols ZnCO3 = 1 mols ZnO; therefore,
mols ZnO = mols ZnCO3.
grams ZnO = mols ZnO x molar mass ZnO = ?
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