Question

8 elección múltiple 1 punto a student increases the volume of a syringe at a constant temperature. what will the student observe during this experiment? the number of particles will decrease. the pressure will decrease. the number of particles will increase. the pressure will increase. 9 elección múltiple 1 punto which of these changes will decrease the pressure of a gas? increasing the temperature increasing the volume increase the number of gas particles decreasing the volume 10 elección múltiple 1 punto which phase of matter has the strongest attractions among particles? gases solids liquids 11 numérica 1 punto how many significant figures are in 0.001 1? respuesta

Explanation:

Step1: Recall Boyle's law for question 8

Boyle's law states that at constant temperature, pressure and volume of a gas are inversely - proportional ($P_1V_1 = P_2V_2$). When volume increases, pressure decreases. The number of particles remains constant as no gas is added or removed.

Step2: Analyze gas - pressure change factors for question 9

From the ideal gas law $PV = nRT$ (where $P$ is pressure, $V$ is volume, $n$ is the number of moles of gas, $R$ is the ideal gas constant, and $T$ is temperature), increasing volume ($V$) while keeping other factors constant will decrease pressure ($P$). Increasing temperature or number of gas particles increases pressure, and decreasing volume increases pressure.

Step3: Understand inter - particle forces for question 10

In solids, particles are closely packed and have the strongest inter - particle attractions compared to liquids and gases. In liquids, particles are closer than in gases but not as closely packed as in solids. In gases, particles are far apart and have weak inter - particle attractions.

Step4: Determine significant figures for question 11

For a number less than 1, non - zero digits after the leading zeros are significant. In 0.0012, the significant figures are 1 and 2, so there are 2 significant figures.

Answer:

1. The pressure will decrease.
2. Increasing the volume
3. Solids
4. 2