Which of the following variables are sufficient to calculate molality?

Mass of solute

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Moles of solute

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Moles of solvent

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Mass of solvent

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Solution

The correct option is D
Mass of solvent

Mass of the given solute alone might not be sufficient unless we know the actual structural formula to calculate the number of moles of the solute.

Similarly, knowing just the number of moles of solvent might not be sufficient when the actual structural formula is not known.

For example, molality of a hypothetical solution B and solute A could be calculated if the mass of B and moles of A were known.

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