Respuesta :
Molality is the moles of solute per Kg of solvent. Simply:
m=moles solute/Kg solvent
m=(4.0 moles solute/3.2 Kg solvent)
m=1.25
m=1.3 mol/Kg or 1.3 molal [rounded to nearest tenth]
(FYI - molarity is found by moles of solute divided by liters of solution)
m=moles solute/Kg solvent
m=(4.0 moles solute/3.2 Kg solvent)
m=1.25
m=1.3 mol/Kg or 1.3 molal [rounded to nearest tenth]
(FYI - molarity is found by moles of solute divided by liters of solution)
Answer:
1.3 mol/kg is the molality of a solution.
Explanation:
[tex]Molality=\frac{\text{moles of solute}}{\text{Mass of the solvent (kg)}}[/tex]
Moles of solute = 4.0 moles
Mass of the solvent = 3.2 kg
[tex]Molality=\frac{4.0 mol}{3.2 kg}=1.25 mol/kg\approx 1.3 mol/kg[/tex]
1.3 mol/kg is the molality of a solution containing 4.0 moles of solute in 3.2 kg of solvent.
