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2 years ago

What is the molality of a solution of naphthalene dissolved in chloroform if the solution has a freezing point of -64.7 °C?

Chemistry

1 answer:

Reil [10]2 years ago

4 0

Answer: we know that 10 g of naphthalene is added to a test tube. We determined and the cooling curve above that the freezing point of naphthalene is approximately 80.5 degreesC . We then add 1.1 g of p-dichlorobenzene to the test tube.

Explanation:

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A gas has a pressure of 8.5atm and occupies 24L at 25∘C. What volume (in liters) will the gas occupy if the pressure is increase

Vesna [10]

The volume (in liters) that the gas will occupy if the pressure is increased to 13.5 atm and the temperature is decreased to 15 °C is 15 L

From the question given above, the following data were obtained:

Initial pressure (P₁) = 8.5 atm

Initial volume (V₁) = 24 L

Initial temperature (T₁) = 25 °C = 25 + 273 = 298 K

Final pressure (P₂) = 13.5 atm

Final temperature (T₂) = 15 °C = 15 + 273 = 288 K

<h3>Final volume (V₂) =? </h3>

The final volume of the gas can be obtained by using the combined gas equation as illustrated below:

$\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}\\\\\frac{8.5 * 24}{298} = \frac{13.5 * V_{2}}{288}\\\\ \frac{204}{298} = \frac{13.5 * V_{2}}{288}\\\\$

Cross multiply

298 × 13.5 × V₂ = 204 × 288

4023 × V₂ = 58752

Divide both side by 4023

$V_{2} = \frac{58752}{4023}\\\\$

Therefore, the final volume of the gas is 15 L

Learn more: brainly.com/question/25547148

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What is the molality of a solution of naphthalene dissolved in chloroform if the solution has a freezing point of -64.7 °C? ​

What is the molality of a solution of naphthalene dissolved in chloroform if the solution has a freezing point of -64.7 °C?