which statement best explains why different gases effuse at different rates?\no at a given pressure, gas…

which statement best explains why different gases effuse at different rates?\no at a given pressure, gas particles with smaller masses move faster.\no at a given pressure, gas particles with smaller masses move slower.\no at a given temperature, gas particles with smaller masses move faster.\no at a given temperature, gas particles with smaller masses move slower.

which statement best explains why different gases effuse at different rates?\no at a given pressure, gas particles with smaller masses move faster.\no at a given pressure, gas particles with smaller masses move slower.\no at a given temperature, gas particles with smaller masses move faster.\no at a given temperature, gas particles with smaller masses move slower.

Answer

Brief Explanations:

According to Graham's law of effusion and the kinetic - molecular theory of gases, at a given temperature, the average kinetic energy of gas particles is the same. Since kinetic energy $KE=\frac{1}{2}mv^{2}$, for a fixed $KE$, particles with smaller masses ($m$) have higher velocities ($v$).

Answer:

At a given temperature, gas particles with smaller masses move faster.