What happens to the particles in a gas when they touch a cold surface?

Why is carbon ideal for making different compounds?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

How can you write e method for the experiment of separating sand from water by filtration process? 1-materials 2-steps 3-conclusion also the same for the separating process of water and salt by filtration or distillation. quick because i need to finish my hw