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n(mol) = masa / Mm
masa = mol x Mm
m = 4 moles x 30 g/mol
m = 120 g
2. Mm K2Cr2o7 = 294 g/mol
m = 7 moles x 294 g/mol
m = 2058 g
3. Mm H2O = 18 g/mol
m = 14.3 moles x 18 g/mol
m = 257.4 g
4. Mm HNO3 = 63 g/mol
m = 0.47 mles x 63 g/mol
m = 29.61 g
5. Mm KMnO4 = 158 g/mol
m = 154.6 moles x 158 g/mol
m = 24.426,8 g