chem lab report (need in 7 hours )

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Lab7datas.docx

Lab 7 datas :

Mass of Test tube + MnO2: 34.1215 g Test tube + MnO2 + mixture: 35.3239 g Test tube + MnO2 + mixture: 35.1263 g after 1st heating 35.1260 g after 2nd heating