An impure sample of  is analyzed using TGA technique. TG curve of the sample indicates the total mass change from 85 mg to 30.7 mg when this sample was heated up to 1173 K. calculate the purity of the sample.

To determine the purity of the sample of CaC₂O₄⋅H₂O using Thermogravimetric Analysis (TGA), we can utilize the principle that the weight loss observed during heating corresponds to the loss of volatile components or decomposition of the compound.

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