Stoichiometry
Raoult's law is not applicable to the

Both B & C
Concentrated solutions
Solutes which dissociate or associate in the particular solution
Solutions containing non-volatile solute

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Stoichiometry
Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the

Vapor follows the ideal gas law
Molal latent heat of vaporisation is constant within the limited temperature range
All of these
Volume in the liquid state is negligible compared with that in the vapor state

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