Question

8 formula 1 punto calculate the temperature, in k, when 41.8 l at 276.5 k is compressed to 2.8 l. round to 1 decimal place. respuesta 9 respuestas múltiples 1 punto select all of the particle diagrams below that represent a homogeneous mixture.

Explanation:

Step1: Identify the gas - law formula

For a gas at constant pressure, Charles's law is used: $\frac{V_1}{T_1}=\frac{V_2}{T_2}$, where $V_1$ and $T_1$ are the initial volume and temperature, and $V_2$ and $T_2$ are the final volume and temperature.

Step2: Rearrange the formula to solve for $T_2$

$T_2=\frac{V_2T_1}{V_1}$.

Step3: Substitute the given values

$V_1 = 41.8$ L, $T_1=276.5$ K, $V_2 = 2.8$ L. Then $T_2=\frac{2.8\times276.5}{41.8}$.

Step4: Calculate the value of $T_2$

$T_2=\frac{774.2}{41.8}\approx18.5$ K.

A homogeneous mixture has a uniform composition throughout. In particle - diagrams, a homogeneous mixture of substances would show particles of different types evenly distributed. The top - left diagram shows different types of molecules (blue - white combinations) mixed with other particles (gray spheres), but it is not a homogeneous mixture as the gray spheres are clustered at the bottom. The bottom - right diagram shows only one type of molecule (blue - blue), which is a pure substance, not a mixture. A homogeneous mixture would have different particles evenly spread out. Since no valid homogeneous - mixture diagrams are shown in the provided images (assuming these are the only options), no boxes should be selected.

Answer:

18.5

For question 9: