The molar mass of magnesium fluoride (MgF2) is:
92.9 g
86.69
62.39
43.8 g

Abbreviated as mg-25.

Try adding 700% because of the x in y

Melting increases as mass increases. since alkanes are not branched molecular structures, the one with the heavier mass will have higher melting point.  octane's mp > butane's mp

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