Question

12 numérico 1 punto how many significant figures are in 6000.0 kg? respuesta 5 13 elección múltiple 1 punto which of these changes will decrease the pressure of a gas? increasing the temperature increase the number of gas particles decreasing the volume increasing the volume 14 respuestas múltiples 1 punto which phase(s) of matter have particles in constant motion? solid gas liquid

Explanation:

Question 12:

The number 6000.0 kg has 5 significant figures. Trailing zeros after a decimal point are significant.

Question 13:

According to the ideal - gas law $PV = nRT$, where $P$ is pressure, $V$ is volume, $n$ is the number of moles (number of gas particles), $R$ is the ideal - gas constant, and $T$ is temperature. Increasing the volume ($V$) while keeping other variables constant will decrease the pressure ($P$). So the answer is "Increasing the volume".

Question 14:

In both liquids and gases, the particles are in constant motion. In solids, particles vibrate in fixed positions but do not move freely like in liquids and gases. So the answers are "Liquid" and "Gas".

Answer:

1. 5
2. Increasing the volume
3. Liquid, Gas