Which of the following is not a way to separate the components of a mixture

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

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?