Which laboratory observation would most support the kinetic theory's assumption that molecules in a gas are widely separated?
A) A gas exerts the same pressure on each part of a container's wall.
B) A gas is highly compressible.
C) A gas with a lower formula mass diffuses more rapidly than one with a higher formula mass.
D) A gas expands when the pressure on it is released.

Question

Quizplus · Accepted Answer

The kinetic theory assumes that the particles in a gas are far apart compared to their size, which explains why gases are highly compressible. This is because there is a lot of empty space between the particles that can be reduced when pressure is applied.

Which Laboratory Observation Would Most Support the Kinetic Theory's Assumption