What is the oxidation number for zn(oh)4 2-?

What is the molality of a solution that has 4 mol of kci in 0.800 kg of water

Consider the story you just read. all but one of the choices below indicate that something is living.

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?