Part A

Calculate the vapour pressure at $25C$ of an aqueous solution that is $6\mathrm{.}95\%CaC{l}_2$ by mass. Assume complete dissociation of the solute. The vapour pressure of pure water at $25C$ is $23\mathrm{.}78$ Torr.

Express your answer in torrs to three significant figures.

$P_{\text{v}\text{a}\text{p}}=$