Mole fraction of A in H,O is 0.2. The molality of A in H,O is
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Answer: The molality of the A in water is 13.88 mol/kg.
Explanation:
We are given:
Mole fraction of A is 0.2, which means that 0.2 moles of A is present in 1 mole of solution.
Mole fraction of B
This means that 0.8 moles of B is present in 1 mole of solution.
To calculate the mass of water, we use the equation:
Moles of water = 0.8 mol
Molar mass of water = 18 g/mol
Putting values in above equation, we get:
To calculate the molality, we use the equation:
We are given:
Moles of solute (A) = 0.2 mol
Mass of solvent (water) = 14.4 g = 0.0144 kg (Conversion factor: 1 kg = 1000g)
Putting values in above equation, we get:
Hence, the molality of the A in water is 13.88 mol/kg.
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