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Molality is defined as the total number of moles of solute per kilograms of solvent present in the solution. Check FAQs
m=xsolute1000x2Msolvent
m - Molality?xsolute - Mole Fraction of Solute?x2 - Mole Fraction of Solvent?Msolvent - Molar Mass of Solvent?

Molality using Mole Fraction Example

With values
With units
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Here is how the Molality using Mole Fraction equation looks like with Values.

Here is how the Molality using Mole Fraction equation looks like with Units.

Here is how the Molality using Mole Fraction equation looks like.

294736.8421Edit=1.4Edit10000.19Edit25Edit
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Molality using Mole Fraction Solution

Follow our step by step solution on how to calculate Molality using Mole Fraction?

FIRST Step Consider the formula
m=xsolute1000x2Msolvent
Next Step Substitute values of Variables
m=1.410000.1925g
Next Step Convert Units
m=1.410000.190.025kg
Next Step Prepare to Evaluate
m=1.410000.190.025
Next Step Evaluate
m=294736.842105263mol/kg
LAST Step Rounding Answer
m=294736.8421mol/kg

Molality using Mole Fraction Formula Elements

Variables
Molality
Molality is defined as the total number of moles of solute per kilograms of solvent present in the solution.
Symbol: m
Measurement: MolalityUnit: mol/kg
Note: Value can be positive or negative.
Mole Fraction of Solute
Mole Fraction of Solute is the ration of the number of moles of the solute to the total number of moles of the solute and solvent.
Symbol: xsolute
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Mole Fraction of Solvent
Mole Fraction of Solvent is the ratio of the number of moles of solvent to the total number of moles of solute and solvent.
Symbol: x2
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Molar Mass of Solvent
The Molar Mass of Solvent is the molar mass of the medium in which the solute is dissolved.
Symbol: Msolvent
Measurement: WeightUnit: g
Note: Value can be positive or negative.

Other Formulas to find Molality

​Go Molality using Number of Moles and Mass of Solvent
m=nmsolvent
​Go Molality using Molarity
m=Mol1000ρ1000-MolM1

Other formulas in Molality category

​Go Molality of Solvent of n-solute Solution
b0=1M0
​Go Molality
m=nMass

How to Evaluate Molality using Mole Fraction?

Molality using Mole Fraction evaluator uses Molality = (Mole Fraction of Solute*1000)/(Mole Fraction of Solvent*Molar Mass of Solvent) to evaluate the Molality, The Molality using mole fraction formula is defined as the number of moles of the solute in per kg of the solvent . The SI Unit of molality is moles/kg. Molality is denoted by m symbol.

How to evaluate Molality using Mole Fraction using this online evaluator? To use this online evaluator for Molality using Mole Fraction, enter Mole Fraction of Solute (xsolute), Mole Fraction of Solvent (x2) & Molar Mass of Solvent (Msolvent) and hit the calculate button.

FAQs on Molality using Mole Fraction

What is the formula to find Molality using Mole Fraction?
The formula of Molality using Mole Fraction is expressed as Molality = (Mole Fraction of Solute*1000)/(Mole Fraction of Solvent*Molar Mass of Solvent). Here is an example- 294736.8 = (1.4*1000)/(0.19*0.025).
How to calculate Molality using Mole Fraction?
With Mole Fraction of Solute (xsolute), Mole Fraction of Solvent (x2) & Molar Mass of Solvent (Msolvent) we can find Molality using Mole Fraction using the formula - Molality = (Mole Fraction of Solute*1000)/(Mole Fraction of Solvent*Molar Mass of Solvent).
What are the other ways to Calculate Molality?
Here are the different ways to Calculate Molality-
  • Molality=Number of Moles of Solute/Mass of SolventOpenImg
  • Molality=(Molarity*1000)/(Density of water*1000-Molarity*Molar Mass of Solute)OpenImg
Can the Molality using Mole Fraction be negative?
Yes, the Molality using Mole Fraction, measured in Molality can be negative.
Which unit is used to measure Molality using Mole Fraction?
Molality using Mole Fraction is usually measured using the Mole per Kilogram[mol/kg] for Molality. Millimole per Kilogram[mol/kg] are the few other units in which Molality using Mole Fraction can be measured.
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