in a reaction in which hydrogen reacts with oxygen to produce water, which substances are the reactants? both hydrogen and oxygen hydrogen only oxygen only water only

Are substances released into the environment that in excess amounts cause damage

Chalk is an ionic compound. which is a property of all ionic compounds that makes chalkboard? particularly useful for writing on a a high melting point hardness and brittleness inability to dissolve in water a multicolored appearance

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?