Mass of p-dichlorobenzene in Melting tube.. 0.0100kg Mass of opened sample tube + UNKNOWN. 58.575 g Mass of sample tube + UNKNOWN - sampie 1. u_ 57.905 g. Mass of sample tube with remaining sample. (should be approximately the same as above but check it) Mass of sample tube with both samples removed. 57.905 g. 56.795 g Here are the melting points gathered from the melting point curve. in degrees C: L53.100 pure p-dichlorobenzene L 49,929 ). L 45.101 solution 1 solution 2 What is the molar mass of your unknown, obtained by averaging the molar masses calculated from each of your two runs? O 151.5 O 149 O 151 O 148 O 165.0 O 154 O 147 O 155.5 O 163.5