Homework Help: chemistry

Posted by Anonymous on Wednesday, February 25, 2009 at 11:55am.

Which of the following can be determined if the boiling-point elevation, the mass of solute and the molality of a given solution are known.

The identity of the solute
The polarity of the solute
The size of a molecule of the solute The molecular weight of the solute

My answer: the molecular weight of solute
Reason: m= (mass of solute/M.M. solute)/(kg solvent)
But- I don't know how I'd be able to get the mass of the solvent. Is it possible for me to assume the solvent to be 1 L and convert that to kg?

chemistry - DrBob222, Wednesday, February 25, 2009 at 4:09pm
I think molar mass is the right answer. No, you may not assume the solvent is 1 L and that the density is 1 kg; however, you can assume you have a kg of solvent, that will tell you the moles of solute. And if the delta T is known, the problem must tell you, also, the mass of the solvent. Or if this is a problem and you are trying to work it in parts and you have posted just pieces of the problem, I suggest you post the entire problem as a new post.

Answer this Question

Related Questions

Chemistry - Calculate the boiling point elevation of a solution made from 15.0 g...
Chemistry - Mass of flask = 81.39g Mass of flask and water = 104.26g Mass of ...
Chemistry - How does dissolving a solute affect the boiling point or freezing ...
Chemistry - Pure water boils at 100ºC (212ºF). When a substance is ...
Chemistry - The boiling point elevation of a solution consisting of 2.92 g of a ...
chemistry - Okay so I know how I would normally determine molar mass of a ...
Chemistry - When 2.50g of an unknown solute is dissolved in 40.0g of ethanol the...
chemistry - A lab technician determines the boiling point elevation of an ...
chemistry - A lab technician determines the boiling point elevation of an ...
chemistry - A lab technician determines the boiling point elevation of an ...

For Further Reading

First Name:
School Subject:
Answer: