Homework Help: chemistry

Posted by robert on Tuesday, February 5, 2008 at 9:19pm.

A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?

chemistry - drbob222, Tuesday, February 5, 2008 at 9:34pm
Molality = #mols/kg solvent
mols = g/molar mass

mols (NH4)2SO4 = 78.0g x (1 mol/molar mass) = ??
100.0 g H2O = 0.100 kg.
Plug and chug.
Post your work if you get stuck.

Answer this Question

Related Questions

Chem - Calculate the concentration in mol per litre of ammonium ions in a ...
Chemistry - 4.0 gram of ferrous ammonium sulphate, FeSO4*(NH4)2SO4 * 6H2O, is ...
CHEMISTRY - HOW MANY MOLES OF NH3 WOULD BE FORMED FROM 50 GRAMS OF (NH4)2SO4 IN ...
Chem - 4.0 gram of ferrous ammonium sulphate, FeSO4*(NH4)2SO4 * 6H2O, is used. ...
chemistry - the question reads: a) balance the equation: H3PO4 + Ca(OH)2 --&...
Chemistry - How many moles of ammonium sulfate can be made from the reaction of ...
Chemistry - how many kilograms of NH3 are needed to produce 2.90x10^5kg of (NH4)...
Chemistry - how many kilograms of NH3 are needed to produce 2.90x10^5kg of (NH4)...
chemistry - Ammonium sulfate can be made by the reaction H2SO4 + 2 NH3 ® (...
chemistry - how many moles of ammonium sulfate can be made from the rxn of 30.0 ...

For Further Reading

First Name:
School Subject:
Answer: