Simple distillation is best used to separate two liquids that have boiling points that differ by

How does litmus paper indicate an acid?

What must happen before a body cell can begin mitotic cell division

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?