Length of heating time for empty crucible and lid                                        _____10.0 min__   Mass of empty crucible and lid after heating                              _____15.05 g___   Heating the magnesium Mass of crucible, lid, and unreacted magnesium                        _____17.68 g____   Mass of empty crucible and lid (from Part A.)                             ______________g_   Mass of unreacted magnesium                                                    ______________g     Determine the mass of the unreacted magnesium.

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