Since the beaker was heated we can asume that only magnesium cloride is left in the beaker, therfore the difference between the beaker with magnesium chloride and the empty beaker give the mass of magnisium chloride:
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It is solid because of the pressure. Hope this helps :))
Answer:
Substance B, boiling point of 105 °C
Explanation:
Non volatile substances have high boiling points