Answer Happy

The freezing point
of benzene, C6H6,
is 5.500 °C at 1
atmosphere. Kf(benzene)
= 5.12 °C/m
In a laboratory experiment, students synthesized a new compound and
found that when 11.84 grams of the
compound were dissolved in 215.0 grams
of benzene, the solution began to freeze
at 4.771 °C. The compound was also found
to be nonvolatile and a non-electrolyte.
What is the molecular weight they determined for this compound?
(g/mol)
The boiling point
of benzene, C6H6,
is 80.100 °C at 1 atmosphere.
Kb(benzene)
= 2.53 °C/m
In a laboratory experiment, students synthesized a new compound and
found that when 11.87 grams of the
compound were dissolved in 249.5 grams
of benzene, the solution began to boil
at 80.440 °C. The compound was also
found to be nonvolatile and a non-electrolyte.
What is the molecular weight they determined for this compound ?
(g/mol)
thank you!