The boiling point of chloroform, CHCI,, is 61.700 °C at 1 atmosphere. K₁(chloroform) = 3.67 "C/m In a laboratory experiment, students synthesized a new compound and found that when 14.75 grams of the compound were dissolved in 210.9 grams of chloroform, the solution began to boil at 62.364 °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

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The boiling point of chloroform, CHCI,, is 61.700 °C at 1 atmosphere. K₁(chloroform) 3.67 C/m
In a laboratory experiment, students synthesized a new compound and found that when 14.75 grams of the compound
were dissolved in 210.9 grams of chloroform, the solution began to boil at 62.364 °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 freezing point of water H₂O is 0.00 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is
antifreeze (ethylene glycol).
How many grams of antifreeze, CH₂OHCH₂OH (62.10 g/mol), must be dissolved in 255.0 grams of water to reduce the
freezing point by 0.300 °C? Refer to the table for the necessary boiling or freezing point constant.
Formula
K(°C/m) K(°C/m)
Solvent
Water
H₂O
0.512
Ethanol
CH3CH₂OH
1.22
Chloroform
CHC13
3.67
Benzene
Co He
2.53
Diethyl ether CH3 CH₂OCH₂ CH3 2.02
Mass=
9
1.86
1.99
5.12
An aqueous solution is 40.0% by mass potassium bromide, KBr, and has a density of 1.37 g/mL.
The molarity of potassium bromide in the solution is
M.
Transcribed Image Text:The boiling point of chloroform, CHCI,, is 61.700 °C at 1 atmosphere. K₁(chloroform) 3.67 C/m In a laboratory experiment, students synthesized a new compound and found that when 14.75 grams of the compound were dissolved in 210.9 grams of chloroform, the solution began to boil at 62.364 °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 freezing point of water H₂O is 0.00 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol). How many grams of antifreeze, CH₂OHCH₂OH (62.10 g/mol), must be dissolved in 255.0 grams of water to reduce the freezing point by 0.300 °C? Refer to the table for the necessary boiling or freezing point constant. Formula K(°C/m) K(°C/m) Solvent Water H₂O 0.512 Ethanol CH3CH₂OH 1.22 Chloroform CHC13 3.67 Benzene Co He 2.53 Diethyl ether CH3 CH₂OCH₂ CH3 2.02 Mass= 9 1.86 1.99 5.12 An aqueous solution is 40.0% by mass potassium bromide, KBr, and has a density of 1.37 g/mL. The molarity of potassium bromide in the solution is M.
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