Question

chloroform is a common liquid used in labs. it vaporizes readily. if the pressure of the cholorform vapor in a flask is 195mm Hg. at 25 degrees Celsius and the density of the vapor is 1.25g/L, whats the color mass of choloform?

Answer 1

Answer on Question #55458 – Chemistry – General Chemistry

Question:

Chloroform is a common liquid used in labs. It vaporizes readily. If the pressure of the chloroform vapor in a flask is $195\mathrm{mmHg}$ at $25^{\circ}$ Celsius and the density of the vapor is $1.25\mathrm{g / L}$, what is the molar mass of choloform?

Answer:

According to the gas laws,

$$M = \frac {\rho R T}{P}$$ $$R = 62.3637 \mathrm{L} \cdot \text{Torr/mol} \cdot \mathrm{K} \text{ or } \mathrm{L} \cdot \mathrm{mmHg/mol} \cdot \mathrm{K}$$ $$M = \frac {1.25 \cdot 62.3637 \cdot (25 + 273)}{195} = 119 \mathrm{g/mol}$$

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